How can societies effectively reduce crime without exacerbating adversarial relationships between the police and citizens? In recent decades, perhaps the most celebrated innovation in police reform has been the introduction of community policing, where citizens are involved in building channels of dialogue and improving police-citizen collaboration. Despite the widespread adoption of community policing in the United States and increasingly in the developing world, there is still limited credible evidence about whether it realistically increases trust in the police or reduces crime. Through simultaneously coordinated field experiments in a diversity of political contexts, this book presents the outcome of a major research initiative into the efficacy of community policing. Scholars from around the world uncover whether, and under what conditions, this highly influential strategy for tackling crime and insecurity is effective. With its highly innovative approach to cumulative learning, this project represents a new frontier in the study of police reform.

What is the reaction of the host society to immigrants’ political integration? We argue that when they win political office, immigrants pose a threat to natives’ dominant position, triggering hostility from a violent-prone fringe, the mass public and the elites. We test these dynamics across UK general elections, using hate crime police records, public opinion data, and text data from over 500,000 newspaper articles. We identify the public’s reactions with a regression discontinuity design of close elections between minority-immigrant and dominant group candidates. Our findings suggest a public backlash against ethnic minority immigrants’ integration into majority settings.

One Health is an interdisciplinary approach that advocates for programs and policies that integrate governance, conservation, agriculture, disease ecology, and global health to achieve desired health outcomes. However, rigorous research around integrated One Health programming is limited and/or in very early stages, especially concerning counterfactual-based studies focused on the effectiveness of integrated conservation and health programming, including those focused on the intersection of zoonosis spillover risk in the context of land-use change. We argue that filling these knowledge gaps requires an implementation science approach. This requires evaluation through a counterfactual lens, but also requires a new approach to donor funded program design and the entire project cycle. We present benefits, challenges, and lessons learned from three case studies of efforts at applying an implementation science approach to integrated conservation and health programming in Madagascar, Zambia, and Ghana and Côte d’Ivoire. We demonstrate the value of integrating an implementation science approach at program inception, and the importance of building the evidence base on the effectiveness of integrated conservation and health programming. We demonstrate that despite significant challenges, it is possible to pursue an implementation science approach for cross-sectoral conservation and health programs, including studies on zoonosis spillover risk in the context of efforts to improve environmental outcomes.

In Western democracies, like the United States, the United Kingdom, and Germany, the number of ethnic minority representatives has been steadily increasing. How is this trend shaping electoral behavior? Past work has focused on the effects of minority representation on ethnic minorities’ political engagement, with less attention to the electoral behavior of majority-group members. We argue that increased minorities’ representation can be experienced as a threat to a historically white-dominant political context. This, in turn, politically activates white constituents. Using data from four U.K. general elections and a regression discontinuity design, we find that the next election’s turnout in constituencies narrowly won by an ethnic minority candidate is 4.3 percentage points larger than in constituencies narrowly won by a white candidate. Consistent with our argument, this turnout difference is driven by majority-white constituencies. Our findings have implications for intergroup relations and party politics and help explain recent political dynamics.

The limited market size of many small emerging economies is a key constraint to the growth of innovative small and medium enterprises. Exporting offers a potential solution, but firms may struggle to locate and appeal to foreign buyers. We conducted a six-country randomized experiment with 225 firms in the Western Balkans to test the effectiveness of 30 h of live group-based training and 5 h of one-on-one remote consulting in overcoming these constraints. Treated firms used techniques such as search engine optimization and improved Facebook content to increase their digital presence and better reach foreign customers. A year later, we find positive and significant impacts on the number of customers, and a significant intensive margin increase in export sales. Qualitative interviews suggest this improvement came from a combination of sector-specific advice on market expansion, and through an encouragement effect which gave entrepreneurs the confidence to try new sales strategies.

New medications that target biological mechanisms to address obesity, diabetes and related cardiometabolic conditions are widely popular. As not everyone is eligible, willing or able to take medications, structural and behavioural solutions remain essential to treat and decrease the risk of cardiometabolic diseases.

Young citizens vote at relatively low rates, which contributes to political parties de-prioritizing youth preferences. We analyze the effects of low-cost online interventions in encouraging young Moroccans to cast an informed vote in the 2021 elections. These interventions aim to reduce participation costs by providing information about the registration process and by highlighting the election’s stakes and the distance between respondents’ preferences and party platforms. Contrary to preregistered expectations, the interventions did not increase average turnout, yet exploratory analysis shows that the interventions designed to increase benefits did increase the turnout intention of uncertain baseline voters. Moreover, information about parties’ platforms increased support for the party closest to the respondents’ preferences, leading to better-informed voting. Results are consistent with motivated reasoning, which is surprising in a context with weak party institutionalization.

The study asserts that heightened humanitarian aid, coupled with inclusive hosting policies, fosters a mutually beneficial environment for both host and refugee communities. Against a backdrop of growing forced displacement, the inquiry delves into refugee dynamics, often overlooked in high-income settings. Uganda’s inclusive policies, accommodating 1.5 million refugees, provide a compelling case study. Analysis reveals significant improvements in public services, challenging assumptions of anti-refugee backlash. The findings underscore the imperative to sustain inclusive policies amidst funding uncertainties. Lessons gleaned advocate for further research on refugee welfare impacts and a dual focus on host community support, crucial for nurturing cohesive host-refugee relations in an increasingly uncertain landscape.

Transparency is expected to strengthen electoral accountability. Yet, initiatives disseminating politician performance information directly prior to elections have reported mixed results. We argue that to be effective, transparency needs to be sustained: The dissemination of politician performance information needs to occur early, regularly, and predictably throughout the term. Using a formal model of electoral accountability under nonprogrammatic and uneven party competition, we study how sustained transparency affects a string of decisions by various actors in advance of elections: incumbents’ running choices, parties’ nomination strategies, and potential challengers’ entry decisions. We show how these effects shape the candidate slate and ultimately electoral outcomes, conditional on incumbent performance and the incumbent party’s relative strength. We test our theory using a field experiment involving 354 subnational constituencies in Uganda, and find robust support for the idea that sustained transparency can improve electoral accountability even in weakly institutionalized electoral settings.

Taking advantage of Ghana’s gradual extension of cellphone towers in the early 2000s, we analyze the wealth effects of cellphone coverage expansion in a developing country setting using a difference-in-differences (event study) research design. We proxy local wealth using night-time light density over 1996–2016 and an asset ownership-based index from the 2000 and 2010 censuses. We find that cellphone coverage expansion significantly r raised wealth in Ghana. We then explore possible downstream effects of cellphone coverage expansion on electoral outcomes. We find no evidence that better off citizens reward incumbents, either in presidential or parliamentary elections. Using Afrobarometer survey data, this null finding appears to be because citizens do not give the government credit for economic improvements that are due to decisions made by private telecommunications companies. Further, increases in cellphone coverage significantly decrease vote-buying, which may be due to voters being harder to buy off when they are better off.

COVID-19 caused a major health crisis and an economic crisis, conditions identified as conducive to stigmatization and hostility against minority groups. It is however unclear whether the threat of infection triggers hate crimes in addition to stigmatization and whether such a reaction can happen at the onset of an unexpected economic shock, before social hierarchies can be disrupted. Leveraging variation across Italian municipalities, we show that (i) hate crimes against Asians increased substantially at the pandemic onset and that (ii) the increase was concentrated in cities with higher expected unemployment but not higher excess mortality. We then examine individual, local, and national mobilization as potential mechanisms and find evidence suggesting that (iii) a xenophobic national discourse and local far-right institutions motivate hate crimes, while we find no strong support for the role of individual prejudice. Our study identifies new conditions triggering hateful behavior, advancing our understanding of factors hindering migrant integration.

Oil discoveries, paired with delays in production, have created a new phenomenon: sustained postdiscovery, pre-production periods. While research on the resource curse has debated the effects of oil on governance and conflict, less is known about the political effects of oil discoveries absent production. Using comprehensive electoral data from Uganda and a difference-in-difference design with heterogeneous effects, we show that oil discoveries increased electoral support for the incumbent chief executive in localities proximate to discoveries, even prior to production. Moreover, the biggest effects occurred in localities that were historically most electorally competitive. Overall, we show that the political effects of oil discoveries vary subnationally depending on local political context and prior to production, with important implications for understanding the roots of the political and conflict curses.

Transparency is expected to strengthen electoral accountability. Yet, initiatives disseminating politician performance information directly prior to elections have reported disappointing results. We argue that to be effective transparency needs to be sustained: the dissemination of politician performance information needs to occur early, regularly, and predictably throughout the term. Using a formal model of electoral accountability under non-programmatic and uneven party competition, we study how sustained transparency impacts a string of decisions by various actors in advance of elections: incumbents’ running choices, party nomination strategies, and potential challengers’ entry decisions. We show how these effects shape the candidate slate and ultimately electoral outcomes, conditional on incumbent performance and the incumbent party’s relative strength. We test our theory using a field experiment involving 354 subnational constituencies in Uganda, and find robust support to the idea that sustained transparency can improve electoral accountability even in weakly institutionalized electoral settings.

Adverse childhood experiences (ACEs)—including child maltreatment, witnessing violence, and household dysfunction—have been robustly associated with poor health in later life. There is also increasing evidence that those who experience childhood adversity are more likely subsequently to be victims or perpetrators of intimate partner violence (IPV). Most evidence, however, is cross-sectional and concentrated in high-income settings, and cannot be generalized to more diverse contexts. In contrast, this study assessed longitudinal relations between ACEs and IPV in a low-income country. We interviewed 1,878 adolescents in rural Malawi between 2017 and 2018 (aged 10–16) and again in 2021 (aged 13–20). Adolescents completed the Adverse Childhood Experience—International Questionnaire. Past-year physical, sexual, and emotional IPV victimization and perpetration were measured using the WHO’s Violence Against Women Instrument. We estimated multivariate regression models between cumulative adversity (0–13 adversities) at baseline and IPV at follow-up among respondents who reported any romantic or sexual partnerships. The cumulative ACEs score was associated with emotional IPV victimization for boys (OR = 1.12 per ACE) and sexual IPV victimization for girls (OR = 1.18). The ACEs score demonstrated a significant association with perpetration for girls only (OR = 1.33 for emotional IPV). By using longitudinal data, we more rigorously demonstrated the critical role of childhood adversity in shaping later IPV behavior. There are ongoing efforts toward primary prevention of childhood adversity. Given the burden that adolescents already carry (six ACEs on average in our sample), we also need secondary interventions that can help interrupt the pathway from adversity to IPV. This calls for increased collaboration between those working to address violence against children and violence against women.

Can the ultrarich shape electoral results by controlling media outlets that openly propagate their political interests? Whether consumers discount slanted media coverage is a question gaining urgency as a growing number of billionaires mix ownership of major media outlets with business interests and political agendas. We study this question in the context of Israel, where billionaire Sheldon Adelson launched in 2007 Israel Hayom, a right-leaning newspaper. Handed out for free, it soon became the most widely read newspaper nationally. Using local media exposure data since the launch, our analysis indicates that the newspaper exerted significant electoral influence, primarily benefiting Netanyahu and his Likud party. This shift helped bring about a sea change in the right’s dominance of national politics. The findings highlight the immense impact the ultrarich can exert in shaping politics through media ownership.

We examine how trust shapes compliance with public health restrictions during the COVID- 19 pandemic in Uganda. We use an endorsement experiment embedded in a mobile phone survey to show that messages from government officials generate more support for public health restrictions than messages from religious authorities, traditional leaders, or international NGOs. We further show that compliance with these restrictions is strongly positively correlated with trust in government, but only weakly correlated with trust in local authorities or other citizens. We use measures of trust from both before and during the pandemic to rule out the possibility that trust is a function of the pandemic itself. The relationship between trust and compliance is especially strong for the Ministry of Health and—more surprisingly—the police. We conclude that trust is crucial for encouraging compliance but note that it may be difficult to sustain, particularly in settings where governments and police forces have reputations for repression.

Is it possible to reduce crime without exacerbating adversarial relationships between police and citizens? Community policing is a celebrated reform with that aim, which is now adopted on six continents. However, the evidence base is limited, studying reform components in isolation in a limited set of countries, and remaining largely silent on citizen-police trust. We designed six field experiments with Global South police agencies to study locally designed models of community policing using coordinated measures of crime and the attitudes and behaviors of citizens and police. In a preregistered meta-analysis, we found that these interventions led to mixed implementation, largely failed to improve citizen-police relations, and did not reduce crime. Societies may need to implement structural changes first for incremental police reforms such as community policing to succeed.

PDRI Co-Director, Harsha Thirumurthy, coauthored an article inJAMA Network Open exploring how COVID-19 lockdowns influenced the economic well-being, food security, and sexual behavior of vulnerable populations in low- and middle-income countries. Findings from a survey in Kenya show lockdowns were associated with declines in employment, income, and numbers of sexual partners, suggesting negative economic impacts and temporarily reduced HIV risk in vulnerable populations.

Background

Methods

Findings

Interpretation

Funding

HIV testing coverage in sub-Saharan Africa is lower among men than women. We investigated the impact of a peer-delivered U = U (undetectable equals untransmittable) message on men’s HIV testing uptake through a cluster randomized trial with individual mobile clinic days as a unit of randomisation.

On standard of care (SOC) days, peer promoters informed men about the availability of HIV testing at the mobile clinic. On intervention days, peer promoters delivered U = U messages. We used logistic regression adjusting for mobile clinic location, clustering by study day, to determine the percentage of invited men who tested for HIV at the mobile clinic.

Peer promoters delivered 1048 invitations over 12 days. In the SOC group, 68 (13%) of 544 men invited tested for HIV (3, 4.4% HIV-positive). In the U = U group, 112 (22%) of 504 men invited tested for HIV (7, 6.3% HIV-positive). Men in the U = U group had greater odds of testing for HIV (adjusted odds ratio = 1.89, 95% CI 1.21-2.95; p = 0.01).

Tailored, peer-delivered messages that explain the benefits of HIV treatment in reducing HIV transmission can increase men’s HIV testing uptake.

Many low-income country governments hire contractors to carry out large infrastructure projects, as they often lack the capacity to implement these themselves. At 14.5% of GDP, low-income countries have the highest share of public procurement in their economies (World Bank 2017). At the same time, low-income countries often have limited capacity to oversee public projects, which can result in low-quality infrastructure and leakage of public funds.

In 2015, Kenya’s President Kenyatta launched the Last Mile Connectivity Project (LMCP), whose goal was “to connect one million new customers to electricity each year” and achieve universal household electricity access by 2020. The USD 500 million program — one of Kenya’s largest public programs, financed largely by international aid agencies — would extend Kenya’s low voltage network to every household located within 600 meters of more than 13,000 sites nationwide. The program also sought to reduce red tape. The old process of applying for electricity — often requiring months of paperwork — would be replaced by a system where Kenya Power contractors initiate connections, with minimal effort from households.

Concerns around corruption are widely thought to threaten the quality, cost, timeliness, and equity of the construction process, and contribute to significant leakage The LMCP is just one example of many infrastructure projects financed by international agencies. To prevent corruption and improve construction quality, such projects are often accompanied by stringent conditions over how local implementing agencies are to use these funds. But do donor conditions actually improve infrastructure quality on the ground? And, could additional independent monitoring improve accountability?

Becoming a successful entrepreneur requires the right combination of factors, impeccable timing, and often sheer luck. In her latest research, Wharton management professor Valentina Assenova examines what it takes to help entrepreneurs who need more luck than most — those who live in places where inequality is institutionalized and the obstacles to success are even higher to hurdle.

Inspired by a trip to South Africa, Assenova tracked the improvement rates for small businesses in Soweto whose owners received help through an incubator. She found that entrepreneurs who were paired with mentors learned the kind of expertise that enabled them to grow their businesses significantly.

Frequent retesting for HIV among persons at increased risk of HIV infection is critical to early HIV diagnosis of persons and delivery of combination HIV prevention services. There are few evidence-based interventions for promoting frequent retesting for HIV. We sought to determine the effectiveness of financial incentives and deposit contracts in promoting quarterly HIV retesting among adults at increased risk of HIV.

A comprehensive evidence-based framework is needed to guide policies and programmes that enable children and adolescents to accrue the human capital required to meet the Sustainable Development Goals (SDGs).

This paper proposes a comprehensive, multisectoral, multilevel life-course conceptualization of human capital development by building on the Nurturing Care Framework (NCF), originally developed for the foundational period of growth and development through the age 3 years. Nurturing care (NC) comprises stable environments that promote children’s health and nutrition, protect from threats, and provide opportunities for learning and responsive, emotionally supportive, and developmentally enriching relationships. NC is fostered by families, communities, services, national policies, and beyond.

The principles apply across the life course, endorse equity and human rights, and promote long-term human capital. This paper presents an evidence-based argument for the extension of the NCF from preconception through adolescence (0–20 years), organised into six developmental periods: preconception/prenatal, newborn/birth, infancy/toddlerhood, preschool, middle childhood, and adolescence.

The proposed framework advances human capital within each developmental period by promoting resilience and adaptive developmental trajectories while mitigating the negative consequences of adversities.

Attaining the SDGs depends on strengthening human capital formation, extending throughout childhood and adolescence and supported by NC. Embedded in enabling laws, policies, and services, the dynamic NCF components can mitigate adversities, enhance resilience and promote the well-being of marginalised groups. The life-course extension of the NCF is strategically positioned to enhance human capital, attain the SDGs, and to ensure that children or adolescents are not left behind in reaching their developmental potential.

HIV testing is a crucial first step to accessing HIV prevention and treatment services and to achieving the UNAIDS target of 95% of people living with HIV being aware of their status by 2030. Combined implementation of facility-based and community-based approaches has helped to achieve high levels of HIV testing coverage in many countries including those in sub-Saharan Africa.

Approaches such as index testing and self-testing help to reach individuals at higher risk of acquiring HIV, men, and those less likely to use health facilities or community-based services. However, as the proportion of people living with HIV who are aware of their HIV status has risen, the challenge of reaching those who remain undiagnosed or those who are at high risk of acquiring HIV has grown.

Demand generation and novel testing approaches will be necessary to reach undiagnosed people living with HIV and to promote frequent retesting among key and priority populations.

This article examines the nature of democratic fragilities in the Americas through survey experiments in Argentina, Brazil, Mexico, and the United States. Encouragingly, strong majorities of citizens recognize violations of democratic principles, laws, and norms. Moreover, how incumbents justify anti-democratic actions has little impact on how citizens view them.

Yet there are minorities, ranging from 10 to 35 percent of the population, who support efforts to erode democracy. And partisanship matters: Many individuals are seemingly “conditional democrats” who support anti-democratic actions if they voted for the incumbent. People are also reluctant to support impeachment for democratic violations, which creates an opening that would-be authoritarians can exploit.

The urban poor in developing countries face challenging living environments, which may interfere with good sleep. Using actigraphy to measure sleep objectively, we find that low-income adults in Chennai, India sleep only 5.5 hours per night on average despite spending 8 hours in bed.

Their sleep is highly interrupted, with sleep efficiency—sleep per time in bed—comparable to those with disorders such as sleep apnea or insomnia. A randomized three-week treatment providing information, encouragement, and improvements to home sleep environments increased sleep duration by 27 minutes per night by inducing more time in bed.

Contrary to expert predictions and a large body of sleep research, increased nighttime sleep had no detectable effects on cognition, productivity, decision-making, or well-being, and led to small decreases in labor supply.

In contrast, short afternoon naps at the workplace improved an overall index of outcomes by 0.12 standard deviations, with significant increases in productivity, psychological well-being, and cognition, but a decrease in work time.

PDRI affiliates Hans-Peter Kohler and Iliana Kohler recently co-authored a study, published in the Journal of Health Economics that investigates the effectiveness of health screenings to reduce the burden of non-communicable diseases in Malawi.

Evidence for the effectiveness of population health screenings to reduce the burden of non-communicable diseases in low-income countries remains very limited. We investigate the sustained effects of a health screening in Malawi where individuals received a referral letter if they had elevated blood pressure. Using a regression discontinuity design and a matching estimator, we find that receiving a referral letter reduced blood pressure and the probability of being hypertensive by about 22 percentage points four years later.

These lasting effects are explained by a 20 percentage point increase in the probability of being diagnosed with hypertension. There is also evidence of an increase in the uptake of medication, while we do not identify improvements in hypertension-related knowledge or risk behaviors. On the contrary, we find an increase in sugar intake and a decrease in physical activity both of which are considered risky behaviors in Western contexts.

The health screening had some positive effects on mental health. Overall, this study suggests that population-based hypertension screening interventions are an effective tool to improve health in low-income contexts.

This study investigated how early childhood education teachers’ (N = 444) depressive and anxiety symptoms predicted their professional well-being outcomes and absenteeism over the course of one school year in Ghana. Higher anxiety and depressive symptoms predicted lower job motivation and job satisfaction and higher levels of emotional exhaustion at the end of the school year. Increased depressive symptoms were further associated with more days absent over the course of the school year. Findings point to the importance of considering teachers’ mental health for early educational quality. Implications for policy and practice are discussed.

Parental human capital and endowments may affect children’s human capital, which in turn may affect children’s earning and occupations and thus affect social mobility.

This paper focuses on what we know about these possible links in low- and middle-income countries. It starts with definitions of human capital and endowments and simple frameworks for guiding the summary of what we know and do not know about these links in low- and middle-income countries.

It discusses determinants of children’s human capital in the form of cognitive skills, socioemotional skills, and health, which pertain directly to some indicators of social mobility; reviews estimates of the impacts of these forms of human capital, which pertain to some other indicators of social mobility, such as incomes and earnings; and concludes with a summary suggesting some positive impacts of parental human capital and endowments on social mobility in low- and middle-income countries and a discussion of gaps in the literature pertaining to both data and methodology.

Maternal undernutrition and adolescent childbearing are prevalent in low- and middle-income countries and have harmful consequences for children. However, less is known on whether these implications persist throughout the offspring’s life course. Moreover, although adult nutritional status has been suggested to largely reflect conditions during the period from conception to 2 years old (“the first 1,000 days”), others have argued that adolescence is an equally important period for nutrition. This is not well established, however, and there is less evidence on the relative importance of conditions during the first 1,000 days of a girl’s life, versus during adolescence, for her nutritional status during pregnancy.

This working paper addresses these gaps through two interrelated investigations. First, we document associations of mothers’ stunting and adolescent childbearing with their children’s developmental outcomes from infancy through early adolescence, using data on a cohort of children and their mothers from Ethiopia, India, Peru, and Vietnam. Second, in order to infer whether maternal adult undernutrition may reflect undernutrition during adolescence, we use data from another cohort of girls in each of these countries who were surveyed throughout adolescence to estimate the extent of catch-up growth during adolescence.

The results suggest that maternal stunting and adolescent childbearing are both associated with offspring stunting at infancy, that the association between the mother’s and offspring’s stunting persists through the offspring’s early adolescence, and that the two maternal outcomes are not systematically associated with offspring cognitive achievement.

Background

Methods

Findings

Ambient air pollution and extreme temperatures have been associated in a number of settings with adverse birth outcomes. However, some newborns may be more vulnerable than others. First, the pathway from ambient conditions to adverse birth outcomes could vary according to indicators of socioeconomic status such as maternal education. For example, less-educated mothers may be more vulnerable than more-educated mothers if they lack access to living, work, transportation, and leisure spaces with indoor air filtration and temperature regulation, or if they lack knowledge of or resources for mitigation strategies. Second, overall effect modifications associaed with maternal education may mask another source of heterogeneity: babies’ underlying innate health. Protective effects of maternal education may be more pronounced for the most physically vulnerable babies.

Linking 54,828 singleton live birth records from a district in Guangzhou, China to ambient air pollution (PM10 and a composite measure) and extreme temperature data, we test whether, overall, maternal education is an “effect modifier” in the relationships between ambient air pollution, extreme temperature, and birth weight. Via conditional quantile regressions, we then test for effect heterogeneity according to the underlying physical vulnerability of babies–those further to the left in the conditional distribution of birth weight–after conditioning on other confounders. Results show that the protection associated with a college-educated mother with respect to pollution and extreme heat is substantial: up to 0.31 standard deviations of birth weight. Importantly, this protection is amplified under more extreme ambient conditions and for physically vulnerable infants, after conditioning on other confounders.

Background: HIV-positive women suffer a high burden of mental disorders due in part to gender-based violence (GBV). Comorbid depression and posttraumatic stress disorder (PTSD) are typical psychiatric consequences of GBV. Despite attention to the HIV-GBV syndemic, few HIV clinics offer formal mental healthcare. This problem is acute in sub-Saharan Africa, where the world’s majority of HIV-positive women live and prevalence of GBV is high.

Methods and findings: We conducted a randomized controlled trial at an HIV clinic in Kisumu, Kenya. GBV-affected HIV-positive women with both major depressive disorder (MDD) and PTSD were randomized to 12 sessions of interpersonal psychotherapy (IPT) plus treatment as usual (TAU) or Wait List+TAU. Nonspecialists were trained to deliver IPT inside the clinic. After 3 months, participants were reassessed, and those assigned to Wait List+TAU were given IPT. The primary outcomes were diagnosis of MDD and PTSD (Mini International Neuropsychiatric Interview) at 3 months.

Secondary outcomes included symptom measures of depression and PTSD, intimate partner violence (IPV), and disability. A total of 256 participants enrolled between May 2015 and July 2016. At baseline, the mean age of the women in this study was 37 years; 61% reported physical IPV in the past week; 91% reported 2 or more lifetime traumatic events and monthly income was 18USD. Multilevel mixed-effects logistic regression showed that participants randomized to IPT+TAU had lower odds of MDD (odds ratio [OR] 0.26, 95% CI [0.11 to 0.60], p = 0.002) and lower odds of PTSD (OR 0.35, [0.14 to 0.86], p = 0.02) than controls. IPT+TAU participants had lower odds of MDD-PTSD comorbidity than controls (OR 0.36, 95% CI [0.15 to 0.90], p = 0.03).

Linear mixed models were used to assess secondary outcomes: IPT+TAU participants had reduced disability (-6.9 [-12.2, -1.5], p = 0.01), and nonsignificantly reduced work absenteeism (-3.35 [-6.83, 0.14], p = 0.06); partnered IPT+TAU participants had a reduction of IPV (-2.79 [-5.42, -0.16], p = 0.04). Gains were maintained across 6-month follow-up. Treatment group differences were observed only at month 3, the time point at which the groups differed in IPT status (before cross over). Study limitations included 35% attrition inclusive of follow-up assessments, generalizability to populations not in HIV care, and data not collected on TAU resources accessed.

Conclusions: IPT for MDD and PTSD delivered by nonspecialists in the context of HIV care yielded significant improvements in HIV-positive women’s mental health, functioning, and GBV (IPV) exposure, compared to controls.

Coproduction between state and civil society for the delivery of public services raises a host of questions that go from the capture of the state, to cooptation of civil society, and efficiencies or accountability in the delivery of public services. Moreover, when this cooperation focuses on vulnerable and historically marginalized indigenous populations, ethical concerns arise about intercultural health and sensitive care.

We are working with two health care non-governmental organizations that deliver mobile health services to pregnant women and children in the tri-border area of Argentina, Bolivia, and Paraguay. The main goal of our research is to assess the impact of the medical intervention and study the individual, community, institutional, and country level determinants of health outcomes.

This paper uses the case of Nazi Operational Zones (OZ) in Italy during WWII to shed light on the legacy of foreign state repression. While the rest of Northern Italy was placed under Fascist rule, the OZ were de facto annexed by Nazi Germany. Using a spatial regression discontinuity design, we show that the OZ experienced harsher political persecution and violence. After the war, OZ areas exhibited greater support for radical opposition and lower political participation. Voters in affected areas showed lower political trust and less support for laws suppressing dissent. Foreign repression, even if temporary, has enduring political consequences.

Misinformation makes democratic governance harder, especially in developing countries. Despite its real-world import, little is known about how to combat fake news outside of the U.S., particularly in places with low education, accelerating Internet access, and encrypted information sharing.

This study uses a field experiment in India to test the efficacy of a pedagogical intervention on respondents’ ability to identify fake news during the 2019 elections (N=1224). Treated respondents received in-person media literacy training in which enumerators demonstrated two tools to identify fake news: reverse image searching and navigating a fact-checking website.

Receiving this hour-long media literacy intervention did not significantly increase respondents’ ability to identify fake news on average. However, treated respondents who support the ruling party became significantly less able to identify pro-attitudinal fake news. These findings point to the resilience of misinformation in India and the presence of motivated reasoning in a traditionally non-ideological party system.

Background

Adolescent girls in Zambia face risks and vulnerabilities that challenge their healthy development into young women: early marriage and childbearing, sexual and gender-based violence, unintended pregnancy and HIV. The Adolescent Girls Empowerment Program (AGEP) was designed to address these challenges by building girls’ social, health and economic assets in the short term and improving sexual behavior, early marriage, pregnancy and education in the longer term. The two-year intervention included weekly, mentor-led, girls group meetings on health, life skills and financial education. Additional intervention components included a health voucher redeemable for general wellness and reproductive health services and an adolescent-friendly savings account.

Methods

A cluster-randomized-controlled trial with longitudinal observations evaluated the impact of AGEP on key indicators immediately and two years after program end. Baseline data were collected from never-married adolescent girls in 120 intervention clusters (3515 girls) and 40 control clusters (1146 girls) and again two and four years later. An intent-to-treat analysis assessed the impact of AGEP on girls’ social, health and economic assets, sexual behaviors, education and fertility outcomes. A treatment-on-the-treated analysis using two-stage, instrumental variables regression was also conducted to assess program impact for those who participated.

Results

The intervention had modest, positive impacts on sexual and reproductive health knowledge after two and four years, financial literacy after two years, savings behavior after two and four years, self-efficacy after four years and transactional sex after two and four years. There was no effect of AGEP on the primary education or fertility outcomes, nor on norms regarding gender equity, acceptability of intimate partner violence and HIV knowledge.

Conclusions

Although the intervention led to sustained change in a small number of individual outcomes, overall, the intervention did not lead to girls acquiring a comprehensive set of social, health and economic assets, or change their educational and fertility outcomes. It is important to explore additional interventions that may be needed for the most vulnerable girls, particularly those that address household economic conditions. Additional attention should be given to the social and economic environment in which girls are living.

Introduction Interventions informed by behavioural economics, such as planning prompts, have the potential to increase HIV testing at minimal or no cost. Planning prompts have not been previously evaluated for HIV testing uptake. We conducted a randomised clinical trial to evaluate the effectiveness of low-cost planning prompts to promote HIV testing among men.

Methods We randomised adult men in rural Ugandan parishes to receive a calendar planning prompt that gave them the opportunity to make a plan to get tested for HIV at health campaigns held in their communities. Participants received either a calendar showing the dates when the community health campaign would be held (control group) or a calendar showing the dates and prompting them to select a date and time when they planned to attend (planning prompt group). Participants were not required to select a date and time or to share their selection with study staff. The primary outcome was HIV testing uptake at the community health campaign.

Evidence on the long-term benefits of early-life interventions remains inadequate in developing countries. In this paper, we evaluate the effect of India’s Integrated Child Development Services (ICDS), a national program of supplementary nutrition and health services, on schooling.

Using national survey data and employing age-state and village or city ward fixed-effect regression, we find that non-migrant 15- to 54-year-old men and 15- to 49-year-old women who were exposed to an ICDS center during the first three years of life completed 0.1–0.3 more grades of schooling than those who were not exposed. The effect is stronger among women than men.

There are limited data characterizing HIV retesting among high-risk adults in sub-Saharan Africa. From October-December 2018, we distributed recruitment cards offering health evaluations with HIV testing at venues frequented by individuals at-risk of HIV infection in Southwest Uganda. Those who attended were asked about their HIV testing history and risk factors: having >1 sexual partner, an HIV+ partner, STIs, and/or transactional sex.

We defined “highest risk” as ≥3 risk factors and “frequent testing” as ≥3 tests within the past year. Of 1,777 cards distributed, 1,482 (83%) adults came to clinic: median age was 26(IQR: 22-31), 598 (40%) were men, and 334 (23%) were HIV+. Of 1,148 HIV-negative adults, 338 (29%) were highest risk and 205 (18%) were frequent testers. Frequent testing was similar in women (19%) and men (16%, p = 0.22). Among women, those at highest risk were more likely to report any testing (90% vs. 81%, p = 0.01) and frequent testing (25% vs. 18%, p = 0.06) than those at lower risk. Among men, any testing and frequent testing were similar between risk levels.

Among adults recruited from high-risk venues in peri-urban Uganda, HIV risk behaviors were commonly reported, yet frequent retesting remained low. Interventions to promote retesting are needed, particularly among men.

Letting workers provide feedback on their managers leads to significant reductions in worker turnover and increases in team productivity

Even though Indian Americans comprise slightly more than 1 percent of the total U.S. population—and less than 1 percent of all registered voters—both major parties are leaving no stone unturned in reaching out to this community. Yet, despite the rising political profile of Indian Americans, their political attitudes are woefully under-studied.

As the 2020 presidential election in the United States approaches, Indian Americans are unexpectedly in the spotlight thanks to their growing affluence and influence in political circles and Democratic candidate Joe Biden’s selection of Kamala Harris (who is of partial Indian origin) as his running mate.

But significant attention is also being paid to Indian Americans because a narrative is emerging that the apparent courtship between U.S. President Donald Trump and Indian Prime Minister Narendra Modi, compounded by concerns over how a Biden administration might manage U.S.-India ties, will push Indian Americans to abandon the Democratic Party in droves.

This study integrates three related field experiments to learn about how information communications technology (ICT) innovations can affect who communicates with politicians. We implemented a nationwide experiment in Uganda following a smaller-scale framed field experiment that suggested that ICTs can lead to significant “flattening”: marginalized populations used short message service (SMS) based communication at relatively higher rates compared to existing political communication channels. We find no evidence for these effects in the national experiment. Instead, participation rates are extremely low, and marginalized populations engage at especially low rates. We examine possible reasons for these differences between the more controlled and the scaled-up experiments. The evidence suggests that even when citizens have issues they want to raise, technological fixes to communication deficits can be easily undercut by structural weaknesses in political systems.

Do founders learn during early-stage venture incubation? If so, what role does learning play in subsequent performance? To answer these questions, I use data from 2,153 applicants to an incubator in Johannesburg, South Africa, and study the relationship between changes in founders’ learning during incubation and their ventures’ post-incubation revenues and profits.

Further, I examine how founders’ random assignment to coaches in the incubator affected learning and compare changes in revenues, costs, employment, and rates of business registration within incubated and non-incubated ventures using a differences-in-differences design. I find that learning during incubation among founders was associated with profitability and revenue growth post-incubation. Every one standard-deviation increase in learning, as measured by changes in entrepreneurs’ mid-point and final exam scores, was associated with a 109% increase in monthly profits and a 136% increase in monthly revenues during the 11 months after venture incubation.

Further, coach centrality moderated the observed benefits of incubation, with a one unit increase in a coach’s centrality being associated with up to 25% increase in founders’ learning during incubation. These findings suggest that early-stage venture incubation promotes learning and that learning contributes to greater scaling and profitability among incubated ventures.

Existing research at the nexus of institutional theory and entrepreneurship suggests that lowering institutional barriers to forming, growing, and exiting new firms through legal and regulatory reforms can affect the types of startups that entrepreneurs found in a region. These institutional changes could affect entrepreneurs’ willingness to partner with organizational sponsors to develop high-growth startups and potentially enhance these sponsors’ ability to select high-growth startups to fund and develop.

This study evaluates these ideas by developing and testing three hypotheses, that institutional reforms (a) improve entrepreneurs’ perceived benefits of the resources that organizational sponsors provide, (b) increase the number, quality, and diversity of applicants for these resources within sponsors’ local ecosystems, and (c) enhance sponsors’ capacity to select high-growth startups into their cohorts.

To evaluate these hypotheses, I analyze data from 13,770 applicants to venture accelerators over multiple application cycles between 2016-2018 in 170 countries, using a difference-in-differences design that exploits institutional reforms that aimed to reduce the time and procedures to start new firms, obtain credit, and resolve bankruptcy for entrepreneurs.

The findings have important implications for how institutional reforms affect early-stage entrepreneurship and the capacity of organizational sponsors to select high-growth early-stage startups to fund and develop within their local ecosystems.

Judicial outcomes should not be influenced by factors that have no bearing on legal decisions, but studies have shown that judges can be affected by extraneous variables such as weather, sports events, and food consumption. Employing the universe of drug offense court decisions in five major Chinese cities between 2014 and 2015, we study whether air pollution and temperature affect sentencing outcomes in China, where air pollution is severe and judges have considerable discretion in sentencing drug cases.

We find that Chinese criminal judges are not at all affected by pollution or temperature changes. One standard deviation change in air pollutant PM2.5 level may change the sentence length by no more than 2% of its standard deviation with over 95% probability. Further analysis shows that our results are robust to a variety of specifications and a battery of robustness checks.

Our findings suggest that judicial rulings are not always swayed by extraneous factors, and we discuss conditions under which public officials are more likely to be shielded from these non-legal factors.

Rapid development in Latin America has been accompanied by lifestyle shifts, including changes in time use and social environments. Overweight/obesity has also emerged as a public health challenge. We examined whether lifestyle changes and sexual maturity−related indicators (early pubertal development and having a child) predict increases in adiposity among Peruvian youth.

Using longitudinal data from Young Lives, we examined changes in adiposity between ages 8 and 15 years old for the younger cohort and ages 15 and 22 years old for the older cohort. Boys and girls in both cohorts demonstrated substantial increases in age‐adjusted adiposity measures, but predictors were different for boys versus girls.

For boys, increases in time spent in work and domestic chores predicted increases in adiposity body mass index and BMI‐for‐age Z‐score, and increases in time spent sleeping were associated with decreases in adiposity (waist circumference and waist‐to‐height ratio). For girls, sexual maturity−related indicators (early menarche and childbearing) predicted increases in adiposity, regardless of time use.

Potential mechanisms for these results may include diet, physical activity, wealth, and urban−rural residence. Time use among youth was associated with diet quality and physical activity, but in different ways for boys versus girls. Strategies for dealing with rising overweight and obesity should incorporate sex‐based specificities.

Parental schooling is widely thought to improve child outcomes. But most studies on parental-child relations are associative, without control for estimation problems, such as unobserved intergenerationally-correlated endowments, if causality is of interest. The few exceptions are relatively recent studies that focus on high-income countries (HICs), with their much different contexts than the low- and middle-income countries (LMICs) in which the vast majority of children globally are growing up.

This paper estimates the causal (conditional on the assumptions for the model) relationships between parents’ schooling and their children’s schooling in the most populous LMIC, using adult identical (monozygotic, MZ) twins data from urban China. Our ordinary least-squares estimates show that one-year increases in maternal and paternal schooling are associated, respectively, with 0.4 and 0.5 more years of children’s schooling.

However, if we control for genetic and other endowment effects by using within-MZ fixed effects, the results indicate that mothers’ and fathers’ schooling have no significant effects on children’s schooling. Our main results remain with various robustness checks, including controlling for measurement error.

These results suggest that the positive associations between children’s and parents’ schooling in standard cross-sectional estimates in this major LMIC are mainly due to the correlation between parents’ unobserved endowments and their schooling and not the effects of their schooling per se.

Drug traffickers sometimes share profits peacefully. Other times they fight. We propose a model to investigate this variation, focusing on the role of the state. Seizing illegal goods can paradoxically increase traffickers’ profits, and higher profits fuel violence.

Killing kingpins makes crime bosses short-sighted, also fueling conflict. Only by targeting the most violent traffickers can the state reduce violence without increasing supply. These results help explain empirical patterns of violence in drug war, which is less studied than interstate or civil war but often as deadly.

Household expenditure surveys, routinely conducted in low—and middle-income countries (LMICs), usually include questions pertaining to recent household expenditures on key food groups. When child anthropometrics are also available, such expenditure data can provide insights into household food purchasing patterns that are associated with subsequent child growth measures.

We used data from 6993 children, born around 2001, from Ethiopia, India, Peru, and Vietnam, from the Young Lives younger cohort. We compared associations between two weeks of household food expenditures (in PPP—Purchasing Power Parity adjusted dollars) on food groups and child height-for-age-Z score (HAZ) at subsequent time points to assess longitudinal associations. Total food expenditures, rural/urban residence, maternal and paternal schooling, and child sex were included in our adjusted models because they may affect the relations between household food group expenditures and future child HAZ.

In Ethiopia, India, and Peru every extra PPP$ spent on fats was associated with 0.02–0.07 higher future HAZ. In Vietnam, every extra PPP$ spent on starches, was significantly associated with a 0.01 lower future HAZ. Across countries, different patterns of food expenditure and procurement may be differentially critical for predicting child HAZ. Our results demonstrate how expenditures on specific food groups can be associated with children’s linear growth. This study provides additional evidence of the utility of longitudinal household food expenditure data in understanding child nutritional status.

The transition from student-teaching to full-time teaching is an understudied period in teachers’ careers. This paper uses a cumulative risk (CR) framework to assess personal and professional risks experienced by 135 student-teachers in rural Ghana during pre-service training and later as newly qualified teachers and examines how risks relate to their professional well-being and learning outcomes of children in their classrooms. Higher CR was associated with lower teacher motivation and personal accomplishment. Furthermore, higher CR predicted lower child numeracy skills and socioemotional development over the school year. Implications for teacher professional development and improving educational quality are discussed.

Objective:

Adolescent girls are at risk for both macro- and micronutrient deficiencies affecting growth, maternal and child health. This study assessed the impact of an adolescent-girl-tailored nutritional education curriculum on nutritional outcomes, including knowledge, dietary behaviour, anthropometry and anaemia.

Design:

A cluster-randomised evaluation was conducted with two study arms: girls in mentor-led weekly girls’ groups receiving sexual and reproductive health and life-skills training assigned to an age-appropriate nutritional curriculum and control girls in the weekly girls’ groups without the nutritional education. The primary analysis was intent-to-treat (ITT) generalised least squares regression. Secondary analysis using two-stage, instrumental-variables estimation was also conducted.

Setting:

The intervention and evaluation were conducted in urban and rural areas across four of ten provinces in Zambia.

Participants:

In total, 2660 girl adolescents aged 10–19 years were interviewed in 2013 (baseline) and annually through 2017.

Results:

ITT results indicate that exposure to the nutritional educational programme did not meaningfully change outcomes for adolescents or their children. Intervention adolescents were no more likely to correctly identify healthy foods (P = 0·51) or proper infant-feeding practices (P = 0·92); were no less likely to be stunted (P = 0·30) or underweight (P = 0·87) and no less likely to be anaemic (P = 0·38). Outcomes for children of intervention participants were not improved, including being breastfed (P = 0·42), stunted (P = 0·21), wasted (P = 0·77) or anaemic (P = 0·51).

Conclusions:

Even a high-quality nutritional educational intervention tailored to adolescents within an empowerment programme does not assure improved nutritional outcomes; adolescent preferences, resource control and household dynamics require consideration in the context of nutritional educational programmes.

This article summarizes research based on the INCAP Longitudinal Study that demonstrates the positive effects of the atole intervention on prime-age adult cognitive skills and productivities.

The findings are interpreted in the context of a life-cycle stage model in which various factors and investments at each stage of life influence outcomes not only in that stage but in subsequent ones. The results point to the likely importance of improvements in adult cognitive skills due to better early-life nutrition on adult male labor market outcomes as well as on women’s “home productivity” in terms of anthropometrics for the next generation.

Possible mechanisms are also explored, including the impacts of early-life exposure to atole on children’s height when starting school, on grades of schooling attainment, and on the extent of experience with higher-skilled jobs, as well as the impacts of improved cognitive skills on wages. Not only are investments in early-life nutrition important for immediate welfare but also they have significant productivity payoffs in adulthood.

Is there a Muslim disadvantage in economic integration to the Chinese economy? Do political mandates from the government help reduce disparities? To answer these questions, we conducted a large-scale audit study and submitted over 4,000 fictitious resumes to job advertisements for accounting and administrative positions posted by private firms, state-owned firms, and foreign firms.

We randomized the ethnic identities of job applicants, their academic merits, and requested salaries. Our results show that a Muslim job seeker is at least 50 percent less likely to receive a callback than a Han job seeker, and higher academic merit does not compensate for this bias.

Importantly, we find that state-owned enterprises are equally likely to discriminate against Muslim job seekers, despite their political mandate to increase diversity. Interview evidence suggests that besides outright hostility towards outgroups, there exist operational costs to diversity-related to building infrastructure that accommodates religious and cultural needs.

What roles do credit constraints and inattention play in the under-adoption of high-return technologies? We study this question in the case of energy efficient cookstoves in Nairobi. Using a randomized field experiment with 1,000 households, we estimate a 300% average annual rate of return to investing in this technology, or $120 per year in fuel savings—around one month of income.

Despite this, adoption rates are low: eliciting preferences using an incentive-compatible Becker-DeGroot-Marschak mechanism, we find that average willingness-to-pay (WTP) is only $12. To investigate what drives this puzzling pattern, we cross-randomize access to credit with two interventions designed to increase attention to the costs and benefits of adoption.

Our first main finding is that credit doubles WTP and closes the energy efficiency gap over the period of the loan. Second, credit works in part through psychological mechanisms: around one-third of the total impact of credit is caused by inattention to loan payments. We find no evidence of inattention to energy savings. Private benefits and avoided environmental damages generate average benefits of $600 for each stove adopted and used for two years.

This paper uses panel data from the Young Lives Survey to examine the effect of the world’s largest public works program and India’s flagship social protection program, the National Rural Employment Guarantee Scheme (NREGS), on children’s learning outcomes such as grade progression, reading comprehension test scores, writing test scores, math test scores, and Peabody Picture Vocabulary Test (PPVT) scores.

We find that the program has strong positive effects on these outcomes in both the short-and-medium run. Finally, the impact estimates reported here are robust to a number of econometric concerns such as – program placement, selective attrition, and type I error.

Rationale

While teachers are heralded as key drivers of student learning outcomes, little attention has been paid to teachers’ mental health, especially in less-developed countries such as Ghana. Professional background, workplace environment, and personal life stressors may threaten teachers’ mental health and subsequent effectiveness in the classroom.

Objectives

The objectives of this study were to investigate 1) whether and how professional background, workplace environment, and personal life stressors predicted teachers’ anxiety and depressive symptoms, and 2) whether participation in a professional development intervention predicted change in teachers’ symptoms over the course of one school year in Ghana.

Method

We used multilevel models to examine predictors of depressive and anxiety symptoms among 444 kindergarten teachers (98% female; age range: 18-69) who participated in the Quality Preschool for Ghana (QP4G) Study. QP4G was a school-randomized control trial (n = 108 public schools; n = 132 private schools) evaluating a one-year teacher professional development intervention program implemented with and without parental-awareness meetings. Teacher depressive and anxiety symptoms were assessed at baseline before the intervention and at the end of the school year.

Results

Poor workplace environment was associated with increased anxiety and depressive symptoms. Social support also predicted symptoms, with a lack of support from students’ parents and being new to the local community associated with more anxiety symptoms. Within teachers’ personal lives, household food insecurity predicted more depressive symptoms. Finally, anxiety and depressive symptoms increased for all teachers over the school year. However, randomization to either intervention was linked to a significantly smaller increase in symptoms over the school year.

Conclusions

Results suggest that teachers’ personal and professional lives are consequential for their mental health and that professional development interventions that provide training and in-class coaching and parent engagement may benefit teachers’ mental health.

This paper examines the impact of a property rights reform in rural China that allowed farmers to lease out their land. We find the reform led to increases in land rental activity in rural households.

Consistent with a model of transaction costs in land markets, our results indicate that the formalization of leasing rights resulted in a redistribution of land toward more productive farmers. Consequently, the aggregate productivity of land increased significantly.

We also find that the reform increased the responsiveness of land allocation across crops to changes in crop prices.

India’s Integrated Child Development Services (ICDS) provides daily supplementary nutrition and other public health services to women and children. We estimated associations between exposure to early-childhood ICDS nutrition and adult reproductive outcomes.

During 1987-1990, a balanced protein-calorie supplement called “upma”-made from locally available corn-soya ingredients-was rolled out by subdistricts near Hyderabad and offered to pregnant women and children under age 6 years. In a controlled trial, 15 villages received the supplement and 14 did not. We used data from a 2010-2012 resurvey of adults born during the trial (n = 715 in intervention and n = 645 in control arms). We used propensity score matching methods to estimate the associations between birth in an intervention village and menarcheal age, age at first pregnancy, and fertility of adults.

We found that women born in the intervention group during the trial, as compared with the control group, had menarche 0.45 (95% confidence interval [CI: 0.22, 0.68]; p < .001) years later and first pregnancy 0.53 (95% CI [0.04, 1.02]; p < .05) years later. Married women from the intervention group had menarche 0.36 (95% CI [0.09, 0.64]; p < .01) years later, first cohabitation with partner 0.8 (95% CI [0.27, 1.33]; p < .01) years later, and first pregnancy 0.53 (95% CI [0.04, 1.02]; p < .05) years later than married women in the control group.

There was no significant difference between intervention and control group women regarding whether they had at least one childbirth or the total number of children born. The findings were similar when we employed inverse propensity score weighted regression models.

We evaluate whether the Juntos conditional cash transfer program in Peru has a larger effect on children who benefited initially from the program during the first 4 years of life compared with those children who benefited initially between ages 5 and 8. The former group was exposed during early-life sensitive periods, received the program for a longer period, and received more growth monitoring sessions and vaccinations.

We find that exposure to Juntos led to an improvement in nutritional status and in cognitive achievement, both of which were greater, but only the latter was significant for those initially exposed during the first 4 years of life.

Some theories predict that profits facilitate peace in illegal markets, while others predict that profits fuel violence. I provide empirical evidence from drug trafficking in Venezuela. Using original data, I compare lethal violence trends in municipalities near a major trafficking route to trends elsewhere, both before and after counternarcotics policy in neighboring Colombia increased the use of Venezuelan transport routes.

For thirty years prior to this policy change, lethal violence trends were similar; afterward, outcomes diverged: violence increased more along the trafficking route than elsewhere. Together with qualitative accounts, these findings illuminate the conditions under which profits fuel violence in illegal markets.

Voluntary physical distancing is essential for preventing the spread of COVID-19. Political partisanship may influence individuals’ responsiveness to recommendations from political leaders.

Daily mobility during March 2020 was measured using location information from a sample of mobile phones in 3,100 US counties across 49 states. Governors’ Twitter communications were used to determine the timing of messaging about COVID-19 prevention.

Regression analyses examined how political preferences influenced the association between governors’ COVID-19 communications and residents’ mobility patterns. Governors’ recommendations for residents to stay at home preceded stay-at-home orders and led to a significant reduction in mobility that was comparable to the effect of the orders themselves.

Effects were larger in Democratic than Republican-leaning counties, a pattern more pronounced under Republican governors. Democratic-leaning counties also responded more to recommendations from Republican than Democratic governors.

Political partisanship influences citizens’ decisions to voluntarily engage in physical distancing in response to communications by their governor.

Global trends of fertility decline, population aging, and rural outmigration are creating pressures to consolidate school systems, with the rationale that economies of scale will enable higher quality education to be delivered in an efficient manner, despite longer travel distances for students. Yet, few studies have considered the implications of system consolidation for educational access and inequality, outside of the context of developed countries.

We estimate the impact of educational infrastructure consolidation on educational attainment using the case of China’s rural primary school closure policies in the early 2000s. We use data from a large household survey covering 728 villages in 7 provinces, and exploit variation in villages’ year of school closure and children’s ages at closure to identify the causal impact of school closure.

For girls exposed to closure during their primary school ages, we find an average decrease of 0.60 years of schooling by 2011, when children were, on average, 17 years old. Negative effects strengthen with time since closure. For boys, there is no corresponding significant effect. Different effects by gender may be related to the greater sensitivity of girls’ enrollment to distance and greater responsiveness of boys’ enrollment to quality

The burden of food insecurity is large in Sub-Saharan Africa, yet the evidence-base on the relation between household food insecurity and early child development is extremely limited. Furthermore, available research mostly relies on cross-sectional data, limiting the quality of existing evidence. We use longitudinal data on preschool-aged children and their households in Ghana to investigate how being in a food insecure household was associated with early child development outcomes across three years.

Household food insecurity was measured over three years using the Household Hunger Score. Households were first classified as “ever food insecure” if they were food insecure at any round. We also assessed the persistence of household food insecurity by classifying households into three categories: (i) never food insecure; (ii) transitory food insecurity, if the household was food insecure only in one wave; and (iii) persistent food insecurity, if the household was food insecure in two or all waves.

Child development was assessed across literacy, numeracy, social-emotional, short-term memory, and self-regulation domains. Controlling for baseline values of each respective outcome and child and household characteristics, children from ever food insecure households had lower literacy, numeracy, and short-term memory.

When we distinguished between transitory and persistent food insecurity, transitory spells of food insecurity predicted decreased numeracy (β = -0.176, 95% CI: -0.317; -0.035), short-term memory (β = -0.237, 95% CI: -0.382; -0.092), and self-regulation (β = -0.154, 95% CI: -0.326; 0.017) compared with children from never food insecure households. By contrast, children residing in persistently food insecure households had lower literacy scores (β = -0.243, 95% CI: -0.496; 0.009).

No gender differences were detected. Results were broadly robust to the inclusion of additional controls. This novel evidence from a Sub-Saharan African country highlights the need for multi-sectoral approaches including social protection and nutrition to support early child development.

Low-cost private schools are expanding across sub-Saharan Africa and are often perceived by parents to be of better quality than public schools. This article assesses the interplay between kindergarten (or preschool) choice, household resources, and children’s school readiness in Ghana. We examine how child, household, and school characteristics predict private versus public kindergarten attendance and whether household characteristics are associated with school readiness beyond preschool selection.

Using a geospatial-identification strategy to account for observed and unobserved determinants of preschool choice, we find that parental investments—including the number of books at home and caregiver help with homework—predict both private-preschool selection and start-of-year child outcomes beyond their influence on preschool choice. We take this evidence as suggesting that investments in children support learning beyond simply selecting the presumed best preschool type.

We also find independent associations between attending private preschool and one-year changes in early literacy scores. The findings contribute knowledge to the literature on the recent expansion of preschool education in sub-Saharan Africa and globally and shed new light on the role of private-preschool attendance in early academic skill development.

Is income during children’s earliest years a key determinant of long-term child and adult success in the long run? The research to date, Christopher Wimer and Sharon Wolf write, suggests that it is. Wimer and Wolf review substantial descriptive evidence that income can enhance child development and later adult outcomes, and that it does so most strongly during children’s earliest years.

Next, they wrestle with the question of whether this relationship is causal. After outlining the challenges in identifying such causal relationships, they describe a number of studies that purport to overcome these challenges through quasi- or natural experiments. Among other topics, the authors examine how family income affects the outcomes of young children compared to those of older children, and how its effects vary among poor, low-income, and higher-income families. They also look at the evidence around other dimensions of income, including nonlinear relationships between income and key outcomes, instability in income versus the absolute level of income, and various forms of income, and they review the evidence for impacts of in-kind or near-cash income supports.

Finally, Wimer and Wolf highlight some recently launched studies that will shed further light on the relationship between income and development in children’s earliest years, and they suggest how policy might better provide income support to low-income families and their children.

Surprising trends in late-counted votes can spark conflict. When late-counted votes led to a narrow incumbent victory in Bolivia last year, fraud accusations followed—with dramatic political consequences. We study the pro-incumbent shift in vote share as the tally progressed, finding that we can explain it without invoking fraud. Two observable characteristics, rurality and region, account for most of the trend. And what looked like a late-breaking surge in the incumbent’s vote share—which electoral observers presented as evidence of foul play—was actually an artifact of methodological and coding errors. Our findings underscore the importance of documenting innocuous explanations for differences between early- and late-counted votes.

There has been little examination of (1) associations of early-life nutrition and adolescent cognitive skills, (2) if they vary by gender, (3) if they differ by diverse contexts, and (4) contributions of post-infancy growth to adolescent cognitive attainment. We use Young Lives data on 7687 children from Ethiopia, India, Peru, and Vietnam to undertake ordinary least squares estimates of associations between age-1 height-for-age z-score (HAZ) and age-15 cognitive outcomes (math, reading, vocabulary), controlling for child and household factors. Age-1 HAZ is positively associated with cognitive scores in all countries.

Child gender-specific estimates for these coefficients either do not differ (math, reading) or favor girls (vocabulary). Augmenting models to include growth in HAZ between ages 1 and 15 years that was not predicted by HAZ at age 1 reveals that such improvements are associated with higher cognitive scores, but that sex-specific coefficients for this predictor favor boys in India and Peru.

The results suggest that nutritional indicators at age 1 have gender-neutral associations with math and reading and favor girls for vocabulary achievement at age 15, but unpredicted improvements in HAZ by adolescence are associated with higher cognitive scores for boys than for girls. This evidence enriches our understanding of relationships between children’s nutritional trajectories during childhood and adolescent cognitive development, and how these associations vary by gender in some contexts to the possible disadvantage of girls.

This household-level intervention is designed by Movva Technologies to improve school-aged children’s learning outcomes during and after the COVID-19 pandemic. Parents will receive text messages in simple English with behavioral nudges targeting parental engagement in children’s learning across grades and ages for in-school and remote learning.

The treatment will include two variations by duration of message receipt and promotion of gender-equitable outcomes in education and broader development. Households will be randomly assigned to one of five groups: 1. Standard messages for (3 months); 2. Messages with a “gender-parity boost” (3 months): 3. Standard messages of longer duration (6 months); into the first term of the next academic year). 4. Messages with a “gender-parity boost” of longer duration: (6 months, into the first term of the next academic year). 5. Comparison group: No messages during the study period.

This handbook provides an integrated picture of knowledge about the economic and social behaviors and interactions of human beings on markets, in households, in companies and in societies. With a core basis in labor economics, human resources, demography and econometrics, it contains a large and complete summary and evaluation of the scientific state of the art.

It relates to relevant fields in law, behavioral science, psychology, health, biology, sociology and political science, among others, where basic human processes are considered. Long survey chapters on core knowledge are combined with shorter frontier research chapters and those with a clear policy perspective.

PDRI’s affiliate Jere R. Behrman has recently co-authored a study in Maternal & Child Nutrition. The article analyzes the associations between exposure to early-childhood nutrition services and adult reproductive outcomes in India.

India’s Integrated Child Development Services (ICDS) provides daily supplementary nutrition and other public health services to women and children. We estimated associations between exposure to early-childhood ICDS nutrition and adult reproductive outcomes. During 1987-1990, a balanced protein-calorie supplement called “upma”-made from locally available corn-soya ingredients-was rolled out by subdistricts near Hyderabad and offered to pregnant women and children under age 6 years. In a controlled trial, 15 villages received the supplement and 14 did not. We used data from a 2010-2012 resurvey of adults born during the trial (n = 715 in intervention and n = 645 in control arms).

We used propensity score matching methods to estimate the associations between birth in an intervention village and menarcheal age, age at first pregnancy, and fertility of adults. We found that women born in the intervention group during the trial, as compared with the control group, had menarche 0.45 (95% confidence interval [CI: 0.22, 0.68]; p < .001) years later and first pregnancy 0.53 (95% CI [0.04, 1.02]; p < .05) years later. Married women from the intervention group had menarche 0.36 (95% CI [0.09, 0.64]; p < .01) years later, first cohabitation with partner 0.8 (95% CI [0.27, 1.33]; p < .01) years later, and first pregnancy 0.53 (95% CI [0.04, 1.02]; p < .05) years later than married women in the control group.

There was no significant difference between intervention and control group women regarding whether they had at least one childbirth or the total number of children born. The findings were similar when we employed inverse propensity score weighted regression models.

Background: Bridging the efficacy-effectiveness gap in HIV prevention and treatment requires policies that account for human behavior.

Setting: Worldwide.

Methods: We conducted a narrative review of the literature on HIV in the field of economics, identified common themes within the literature, and identified lessons for implementation science.

Results: The reviewed studies illustrate how behaviors are shaped by perceived costs and benefits across a wide range of health and non-health domains, how structural constraints shape decision-making, how information interventions can still be effective in the epidemic’s fourth decade, and how lessons from behavioral economics can be used to improve intervention effectiveness.

Conclusion: Economics provides theoretical insights and empirical methods that can guide HIV implementation science.

Background: Continued progress in reducing maternal and newborn morbidity and mortality in low-income countries requires a renewed focus on the quality of delivery care. Reliable electricity and lighting are a cornerstone of a well-equipped health system, but most primary maternity care facilities in sub-Saharan Africa are either not connected to the electrical grid or suffer frequent blackouts.

Lack of reliable electricity and light in maternity facilities may contribute to poor quality of both routine and emergency obstetric and newborn care, by hindering infection control, increasing delays in providing care, and reducing health worker morale. The “Solar Suitcase” is a solar electric system designed specifically for maternity care facilities in low-resource environments. The purpose of this trial is to evaluate the impact of the Solar Suitcase on the reliability of light, quality of obstetric and newborn care, and health worker satisfaction.

Methods: We are conducting a study with 30 maternity care facilities in rural Uganda that lack access to a reliable, bright light source. The study is a stepped wedge cluster randomized controlled trial. Study facilities are identified according to predefined eligibility criteria and randomized by blocking on baseline covariates. The intervention is a “Solar Suitcase”, a complete solar electric system that provides essential lighting and power for charging phones and small medical devices.

The primary outcomes are the reliability and quality of light during intrapartum care, the process quality of obstetric and newborn care, and health worker satisfaction. Outcomes will be assessed via direct clinical observation by trained enumerators (estimated n = 1980 birth observations), as well as interviews with health workers and facility managers. Lighting and blackouts will be captured through direct observation and via light sensors installed in facilities.

Discussion: A key feature of a high-quality health system is an appropriate infrastructure, including reliable, bright lighting, and electricity. Rigorous evidence on the role of a reliable light source in maternal and newborn care is needed to accelerate the “electrification” of maternity facilities across sub-Saharan Africa. This study will be the first to rigorously assess the extent to which reliable light is an important driver of the quality of care experienced by women and newborns.

There has been little examination of (1) associations of early-life nutrition and adolescent cognitive skills, (2) if they vary by gender, (3) if they differ by diverse contexts, and (4) contributions of post-infancy growth to adolescent cognitive attainment. We use Young Lives data on 7687 children from Ethiopia, India, Peru, and Vietnam to undertake ordinary least squares estimates of associations between age-1 height-for-age z-score (HAZ) and age-15 cognitive outcomes (math, reading, vocabulary), controlling for child and household factors. Age-1 HAZ is positively associated with cognitive scores in all countries.

Child gender-specific estimates for these coefficients either do not differ (math, reading) or favor girls (vocabulary). Augmenting models to include growth in HAZ between ages 1 and 15 years that was not predicted by HAZ at age 1 reveals that such improvements are associated with higher cognitive scores, but that sex-specific coefficients for this predictor favor boys in India and Peru.

The results suggest that nutritional indicators at age 1 have gender-neutral associations with math and reading and favor girls for vocabulary achievement at age 15, but unpredicted improvements in HAZ by adolescence are associated with higher cognitive scores for boys than for girls. This evidence enriches our understanding of relationships between children’s nutritional trajectories during childhood and adolescent cognitive development, and how these associations vary by gender in some contexts to the possible disadvantage of girls.

Do social networks matter for the adoption of new forms of political participation? We develop a formal model showing that the quality of communication that takes place in social networks is central to understanding whether a community will adopt forms of political participation where benefits are uncertain and where there are positive externalities associated with participation. Early adopters may exaggerate benefits, leading others to discount information about the technology’s value.

Thus, peer effects are likely to emerge only when informal institutions support truthful communication. We collect social network data for 16 Ugandan villages where an innovative mobile‐based reporting platform was introduced. Consistent with our model, we find variation across villages in the extent of peer effects on technology adoption, as well as evidence supporting additional observable implications. Impediments to social diffusion may help explain the varied uptake of new and increasingly common political communication technologies around the world.

Background

Individual behavior change is a critical ingredient in efforts to improve global health. Central to the focus on behavior has been a growing understanding of how the human brain makes decisions, from motivations and mindsets to unconscious biases and cognitive shortcuts. Recent work in the field of behavioral economics and related fields has contributed to a rich menu of insights and principles that can be engineered into global health programs to increase impact and reach. However, there is little research on the process of designing and testing interventions informed by behavioral insights.

Methods

In a study focused on increasing household participation in a Chagas disease vector control campaign in Arequipa, Peru, we applied Datta and Mullainathan’s “behavioral design” approach to formulate and test specific interventions. In this Technical Advance article we describe the behavioral design approach in detail, including the Define, Diagnosis, Design, and Test phases. We also show how the interventions designed through the behavioral design process were adapted for a pragmatic randomized controlled field trial.

Results

The behavioral design framework provided a systematic methodology for defining the behavior of interest, diagnosing reasons for household reluctance or refusal to participate, designing interventions to address actionable bottlenecks, and then testing those interventions in a rigorous counterfactual context. The behavioral design offered us a broader range of strategies and approaches that are typically used in vector control campaigns.

Conclusions

Careful attention to how behavioral design may affect the internal and external validity of evaluations and the scalability of interventions is needed going forward. We recommend behavioral design as a useful complement to other intervention design and evaluation approaches in global health programs.

Importance  Interventions to reduce men’s alcohol use and risky sexual behaviors are essential for reducing new HIV infections in high-prevalence settings in sub-Saharan Africa. Prize-linked savings accounts can motivate savings and may decrease expenditures on risky behaviors, but few studies have examined the HIV prevention potential of such savings interventions among men.

Objective  To evaluate the effect of prize-linked savings accounts on savings behavior and expenditures on alcohol, gambling, and transactional sex among men in Kenya.

Design, Setting, and Participants  Randomized clinical trial among communities in Siaya County, Kenya. Participants were men 21 years or older who owned a mobile phone were engaged in fishing or transportation sector work, and were willing to open an account with a local bank; they were screened for eligibility between September 3 and October 5, 2018.

Interventions  Eligible participants were offered savings accounts endowed with 1000 Kenya shillings (US $10) and randomized (1:1) to receive weekly lottery-based rewards contingent on growth in savings balance or to a control group that received standard interest.

Main Outcomes and Measures  The primary outcome was an indicator of whether a participant saved any money in the bank account (intent-to-treat analysis) during the study period. Secondary outcomes included the total amount saved in the bank account, the total amount saved in all sources, and expenditures on alcohol, gambling, and transactional sex.

Results  A total of 425 men were screened, 329 (77.4%) met eligibility criteria, 300 (70.6%) were enrolled (with 152 randomized to the intervention group and 148 to the control group), and 270 of 300 (90.0%) opened bank accounts. Participants’ mean age was 33.7 years (interquartile range, 13.5 years), 84.3% (253 of 300) were married, and the mean weekly earnings were US $30 (interquartile range, US $23). During a mean (SD) follow-up of 9 (2) weeks, 37.3% (50 of 134) in the intervention group saved money in a bank account vs 27.2% (37 of 136) in the control group, although the difference was not statistically significant (odds ratio, 1.62; 95% CI, 0.96-2.74). The intervention group had higher growth in bank savings balances (US $10.26; 95% CI, US $5.00-US $58.20 vs US $4.87; 95% CI, US $0.67-US $9.00) and higher total savings from all sources (US $201; 95% CI, US $133-US $269 vs US $145; 95% CI, US $88-US $202), but neither difference was statistically significant. The intervention did not have a significant effect on alcohol, gambling, and transactional sex expenditures.

Conclusions and Relevance  Prize-linked savings accounts modestly increased savings among high-risk men in Kenya over a 9-week period, but the difference compared with standard-interest savings accounts was not significant. Testing of more powerful savings products is needed to assess whether such savings-led interventions can reduce men’s expenditures on alcohol, gambling, and transactional sex.

Studies of gender disparities in STEM (science, technology, engineering, and mathematics) performance have generally focused on average differences. However, the extremes could also be important because disparities at the top may shape stratification in access to STEM careers, while disparities at the bottom can shape stratification in dropout.

This article investigates determinants of gender disparities in math across the performance distribution in Latin American countries, where there is a persistent boys’ advantage in STEM performance. Findings reveal disparate national patterns in gender gaps across the performance distribution. Furthermore, while certain national characteristics are linked to gender gaps at the low- and middle-ranges of the performance distribution, female representation in education is the only characteristic associated with a reduced gender gap at the top level.

Greater awareness of HIV status and more frequent testing in high-risk populations are essential for realizing the promise of treatment as prevention and achieving the 90-90-90 targets of the Joint United Nations Programme on HIV/AIDS (that by 2020, 90% of people living with HIV will know their HIV status, 90% of people with diagnosed HIV will be on antiretroviral therapy [ART], and 90% of people receiving ART will be virally suppressed).¹ Yet in sub-Saharan Africa, nearly 20% of people living with HIV were unaware of their status in 2017.² Despite the scale-up of a clinic- and community-based models for providing HIV testing services, testing coverage remains suboptimal, particularly among men and other key populations.³ To close the testing gap and advance HIV prevention objectives, innovative approaches are needed to increase the uptake of HIV testing in sub-Saharan Africa.

A self-administered test for HIV allows individuals to collect their own sample and to perform a simple, rapid HIV antibody test in the absence of a health care practitioner.⁴ Several oral fluid-based or blood-based HIV tests have received prequalification from the World Health Organization and showed high sensitivity and specificity among lay users.⁴ Existing research shows high interest in and acceptability of HIV self-testing across a wide range of populations.^5–12 After the 2016 World Health Organization guidelines that recommended large-scale implementation of HIV self-testing, self-tests are becoming more widely available in governmental health facilities and retail outlets in several countries in sub-Saharan Africa with high HIV prevalence.⁴

Donor agencies and governments have heavily subsidized HIV self-tests for distribution in some countries, and private sector availability is emerging in parallel.¹³ However, the cost of self-tests and the price for consumers represent important obstacles to large-scale implementation of HIV self-testing. As countries seek to scale up HIV self-testing for priority populations, little evidence exists on the effect of alternative pricing and marketing strategies on self-testing demand. A growing body of evidence from low-income countries shows that demand for prevention technologies, such as antimalarial bed nets and water filtration solutions, is highly price sensitive.^14–19 Knowing the self-testing demand at various prices in the general population and key subgroups is important for setting appropriate subsidy levels for these self-tests and for understanding the demand for HIV prevention technologies in general. Moreover, with HIV self-testing, information is limited about the optimal distribution approaches for reaching untested individuals and messaging strategies for promoting the adoption of such new technologies. Estimating how demand is affected not only by prices but also by various distribution approaches and types of information provided to consumers can further inform HIV self-testing scale-up efforts.

We conducted a large community-based randomized clinical trial to examine the optimal pricing policies and distribution strategies for HIV self-testing in Zimbabwe.

Social context theory suggests that an important driver of political participation is the behavior of family, friends, co-workers and neighbors. How do social ties between individuals shape equilibrium behavior in larger populations? Despite theoretical inroads into this question, direct empirical tests remain scarce due to data limitations. We fill this gap using full social network data from 15 villages in rural Uganda, where village-level turnout is the outcome of interest. We find that levels of participation predicted by structural features of village networks are strongly associated with actual village-level turnout in low-salience local elections, and weakly associated in high-salience presidential elections. We also find that these features predict other forms of political participation, including attending village meetings and contributing to village projects. In addition to demonstrating that networks help explain political participation, we provide evidence that the mechanism of influence is that proposed by social context theory rather than alternative mechanisms like the presence of central brokers or the ability of networks to diffuse information.

If intrinsic motivations alone were enough to influence health behaviors, individuals would not smoke, all drivers would wear seat belts, and patients with chronic conditions would take their medications. Yet approximately half of patients prescribed single-drug therapy for hypertension discontinue their medications within a year,¹ even though presumably they want to avoid strokes and hopefully know that taking their medication is one way to reduce health risks.

To supplement the intrinsic motivations apparently insufficient to the task, economists and others have long proposed extrinsic motivations in the form of financial rewards. These rewards offer the added benefit of being immediate rather than the typically delayed intrinsic rewards of better health sometime in the future. Studies in varied health domains have revealed that financial incentives work well.

For example, a 2015 systematic review determined that to reduce smoking during pregnancy, financial or material incentives were more effective than other medical or behavioral strategies.² The use of incentives is also widespread. In 2018, 86% of US employers offered some financial incentives for healthy behavior,³ and in lower-income countries, conditional cash transfer programs rewarded utilization of preventive services.

How does temperature affect household energy demand in low-income countries? I use 132,375,282 hourly electricity consumption observations from 5,975 households in South Africa to estimate the causal effects of short-term temperature changes on household electricity consumption. The estimates flexibly identify a constant log-linear temperature response – for every 1°C increase in temperature, electricity consumption decreases by 4.1% among temperatures below the heating threshold but increases by 8.1% among temperatures above the cooling threshold.

This relationship is driven more strongly by seasonal than hourly temperature changes. Holding all else constant, a 3.25°C increase in temperatures would reduce electricity consumption by 1,093.4 kWh (6.2%) per year per household. Widespread use of electric heating due to limited residential gas heating infrastructure likely drives this. These results point to important regional heterogeneity in how temperature increases may affect household energy demand in the coming decades.

Objective:

To assess the comparative effectiveness of alternative incentive-based interventions to promote HIV testing among men.

Design:

Randomized clinical trial.

Methods:

We enumerated four Ugandan parishes and enrolled men at least 18 years. Participants were randomized to six groups that received incentives of varying types and amount for HIV testing at a 13-day community health campaign. Incentive types were: gain-framed (control): participants were told they would receive a prize for testing; loss-framed: participants were told they had won a prize, shown several prizes, asked to select one, then told they would lose the prize if they did not test; lotteries: those who tested had a chance to win larger prizes. Each incentive type had a low and high amount (∼US$1 and US$5/participant). The primary outcome was HIV-testing uptake at the community health campaign.

Results:

Of 2532 participants, 1924 (76%) tested for HIV; 7.6% of those tested were HIV-positive. There was no significant difference in testing uptake in the two lottery groups (78%; P = 0.076) or two loss-framed groups (77%; P = 0.235) vs. two gain-framed groups (74%). Across incentive types, testing did not differ significantly in high-cost (76%) vs. low-cost (75%; P = 0.416) groups. Within low-cost groups, testing uptake was significantly higher in the lottery (80%) vs. gain-framed (72%; P = 0.009) group.

Conclusion:

Overall, neither offering incentives via lotteries nor framing incentives as losses resulted in significant increases in HIV testing compared with standard gain-framed incentives. However, when offering low-cost incentives to promote HIV testing, providing lottery-based rewards may be a better strategy than gain-framed incentive

Globalization magnifies the problems that affect all people and that require large-scale human cooperation, for example, the overharvesting of natural resources and human-induced global warming. However, what does globalization imply for the cooperation needed to address such global social dilemmas? Two competing hypotheses are offered. One hypothesis is that globalization prompts reactionary movements that reinforce parochial distinctions among people.

Large-scale cooperation then focuses on favoring one’s own ethnic, racial, or language group. The alternative hypothesis suggests that globalization strengthens cosmopolitan attitudes by weakening the relevance of ethnicity, locality, or nationhood as sources of identification. In essence, globalization, the increasing interconnectedness of people worldwide, broadens the group boundaries within which individuals perceive they belong. We test these hypotheses by measuring globalization at both the country and individual levels and analyzing the relationship between globalization and individual cooperation with distal others in multilevel sequential cooperation experiments in which players can contribute to individual, local, and/or global accounts.

Our samples were drawn from the general populations of the United States, Italy, Russia, Argentina, South Africa, and Iran. We find that as a country and individual levels of globalization increase, so too does individual cooperation at the global level vis-à-vis the local level. In essence, “globalized” individuals draw broader group boundaries than others, eschewing parochial motivations in favor of cosmopolitan ones. Globalization may thus be fundamental in shaping contemporary large-scale cooperation and maybe a positive force toward the provision of global public goods.

Maintaining a healthy diet, being physically active, avoiding tobacco and alcohol abuse, getting adequate sleep and, where necessary, taking appropriate medications have long been first-line recommendations to prevent and treat cardiometabolic conditions — the leading causes of death and disability worldwide. But despite randomized controlled trials that demonstrate the efficacy of lifestyle modification interventions to reduce hypertension (for example, the ‘dietary approaches to stop hypertension’ diet), diabetes (for example, the diabetes prevention programme), high cholesterol (for example, the Mediterranean diet) and their associated burdens, we have had limited success in encouraging individuals to practice and sustain these healthy behaviours at the population level. The numbers of people who are affected by obesity, diabetes and hypertension have more than tripled worldwide in the past four decades. In addition, behavioural strategies (for example, structured counselling programmes) used to promote the uptake of lifestyle interventions have had small or short-term effects¹. As a result, a question that arises is whether we should still look to behaviour change interventions and strategies to help us to prevent and manage cardiometabolic diseases.

The limited market size of many small emerging economies is a key constraint to the growth of innovative small and medium enterprises. Exporting offers a potential solution, but firms may struggle to locate and appeal to foreign buyers. We conducted a six-country randomized experiment with 225 firms in the Western Balkans to test the effectiveness of 30 h of live group-based training and 5 h of one-on-one remote consulting in overcoming these constraints. Treated firms used techniques such as search engine optimization and improved Facebook content to increase their digital presence and better reach foreign customers. A year later, we find positive and significant impacts on the number of customers, and a significant intensive margin increase in export sales. Qualitative interviews suggest this improvement came from a combination of sector-specific advice on market expansion, and through an encouragement effect which gave entrepreneurs the confidence to try new sales strategies.

Exhibiting altruism toward and cooperativeness with others is a key ingredient for successful work relationships and managerial decision making. Rising political polarization creates a hazard because it ruptures this fabric and impedes the interaction of employees, especially across political isles. This paper’s focus is to examine various behavioral-, belief-, and norm-based layers of (non)strategic decision making that are plausibly affected by polarization. I quantify this phenomenon via five preregistered studies in the context of Donald J. Trump, comprising 15 well-powered behavioral experiments and a diverse set of over 8,600 participants. To capture the pervasiveness of polarization, I contrast the findings with various political and nonpolitical identities. Overall, I consistently document strong heterogeneous effects: ingroup-love occurs in the perceptional domain (how close one feels toward others), whereas outgroup-hate occurs in the behavioral domain (how one helps/harms/cooperates with others). The rich setting also enables me to examine the mechanisms of observed intergroup conflict, which can be attributed to one’s grim expectations regarding cooperativeness of the opposing faction, rather than one’s actual unwillingness to cooperate. For the first time, the paper also tests whether popular behavioral interventions (defaults and norm-nudges) can reduce the detrimental impact of polarization in the contexts studied here. The tested interventions improve prosociality but are ineffective in closing the polarization gap.

Adverse childhood experiences (ACEs)-including child maltreatment, witnessing violence, and household dysfunction-have been robustly associated with poor health in later life. There is also increasing evidence that those who experience childhood adversity are more likely subsequently to be victims or perpetrators of intimate partner violence (IPV). Most evidence, however, is cross-sectional and concentrated in high-income settings, and cannot be generalized to more diverse contexts. In contrast, this study assessed longitudinal relations between ACEs and IPV in a low-income country. We interviewed 1,878 adolescents in rural Malawi between 2017 and 2018 (aged 10-16) and again in 2021 (aged 13-20). Adolescents completed the Adverse Childhood Experience-International Questionnaire. Past-year physical, sexual, and emotional IPV victimization and perpetration were measured using the WHO’s Violence Against Women Instrument. We estimated multivariate regression models between cumulative adversity (0-13 adversities) at baseline and IPV at follow-up among respondents who reported any romantic or sexual partnerships. The cumulative ACEs score was associated with emotional IPV victimization for boys (OR = 1.12 per ACE) and sexual IPV victimization for girls (OR = 1.18). The ACEs score demonstrated a significant association with perpetration for girls only (OR = 1.33 for emotional IPV). By using longitudinal data, we more rigorously demonstrated the critical role of childhood adversity in shaping later IPV behavior. There are ongoing efforts toward primary prevention of childhood adversity. Given the burden that adolescents already carry (six ACEs on average in our sample), we also need secondary interventions that can help interrupt the pathway from adversity to IPV. This calls for increased collaboration between those working to address violence against children and violence against women.

Background: In Côte d’Ivoire, cocoa farming is a widespread practice in rural households, an occupation with increased risks of depression and anxiety exacerbated by economic instability. We used the Goldberg-18 Depression and Anxiety diagnostic tool to identify predictors of depressive and anxiety symptomatology among a sample of parents in rural cocoa farming communities.

Methods: In a cross-sectional survey, the Goldberg-18 was administered to Ivorian parents (N = 2471). Confirmatory factor analysis (CFA) was conducted to confirm the factor structure of the assessment tool, and Ordinary Least Squares (OLS) regression with clustered standard errors was used to identify sociodemographic predictors of symptomatology.

Results: CFA showed adequate fit statistics for a two-factor model measuring depressive and anxiety symptoms. Among respondents, 87 % screened positive for requiring further referral for clinical diagnosis. Sociodemographic predictors of depressive and anxiety symptoms were similar for males and females. For the total sample, higher monthly income, more years of education, and belonging to the Mandinka ethnic group predicted fewer depressive and anxiety symptoms. In contrast, higher depressive and anxiety symptomatology were associated with age. Single marital status predicted increased anxiety but not depressive symptoms for the full sample model and the female only sample, but not the male sample.

Limitations: This is a cross-sectional study.

Conclusions: The Goldberg-18 measures distinct domains of depressive and anxiety symptoms in a rural Ivorian sample. Age and single marital status are predictors of increased symptoms. Higher monthly income, higher education, and certain ethnic affiliations are protective factors.

Studies of higher-income democracies find that the growing presence of refugees has generally been met with electoral backlash, with voters punishing incumbents and increasing support for far-right parties. Yet there is a dearth of studies on the political consequences of refugee-hosting in low-income countries, where the vast majority of refugees reside. Theoretically, we discuss why findings from high-income countries may not generalize, and we offer an alternative framework rooted in the context of low-income countries. We then test our framework empirically in Uganda, one of the largest and more inclusive refugee-hosting countries. Combining information on refugee settlements with four waves of national elections data, we find that an increase in refugee presence leads to a significant increase in incumbent support. National survey data coupled with panel data on healthcare, schools, roads, and nighttime lights suggest that the mechanism is positive externalities of inclusive refugee-hosting and aid on local public goods.