We study the Tutoring Online Program (TOP), where: (i) tutoring is entirely online; (ii) tutors are volunteer university students, matched with underprivileged middle school students. We leverage random assignment to estimate effects during and after the pandemic (2020 and 2022), investigating...

Both individual experiences and community characteristics influence how much people trust each other. Using data drawn from US localities we find that the strongest factors that reduce trust are: i) a recent history of traumatic experiences, even though the passage of time reduces this effect...

This paper studies both theoretically and empirically the determinants of group formation and of the degree of participation when the population is heterogeneous, both in terms of income and race or ethnicity. We are especially interested in whether and how much the degree of heterogeneity in...

We test the effectiveness of an entertainment education TV series, MTV Shuga, aimed at providing information and changing attitudes and behaviors related to HIV/AIDS. Using a simple model we show that "edutainment" can work through an individual or a social channel. We conducted a randomized...

If individuals become aware of their stereotypes, do they change their behavior? We study this question in the context of teachers' bias in grading immigrants and native children in middle schools. Teachers give lower grades to immigrant students compared to natives who have the same performance...

Illegal arms are responsible for thousands of deaths in civil wars every year. Yet, their trade is very hard to detect. We propose a method to statistically detect illegal arms trade based on the investor knowledge embedded in financial markets. We focus on eight countries under UN arms embargo...

We survey and assess the literature on the positive and negative effects of ethnic diversity on economic policies and outcomes. Our focus is on both focus both cities in developed countries (the US) and villages in developing countries. We also consider the endogenous formation of political...

The poor favor redistribution and the rich oppose it, but that is not all. Social mobility may make some of today's poor into tomorrow's rich and since redistributive policies do not change often, individual preferences for redistribution should depend on the extent and the nature of social...

Using a new dataset, we investigate the determinants of violence against women in Africa. We focus on cultural factors arising from pre-colonial customs and find evidence consistent with two hypotheses. First, ancient socioeconomic conditions determine social norms about gender roles, family...

In this survey, we review the literature on the impact of exposure to the media. We cast a wide net and cover media impacts on education, family choices, labor and migration decisions, environmental choices, health, crime, public economics, attitudes, consumption and savings, and development...