We show how sanctioning is more effective in increasing cooperation between groups than within groups. We study this using a trust game among ethnically diverse subjects in Afghanistan. In the experiment, we manipulate i) sanctioning and ii) ethnic identity. We find that sanctioning increases...

Reducing the gender gap in education is a primary goal for many countries. Some major challenges for many girls include the distance to school, their safety when commuting to school, lack of agency, and deep-rooted cultural norms. In Zambia, we studied the impact of providing a bicycle to a...

We study how human capital and economic conditions causally affect the choice of religious denomination. We utilize a longitudinal dataset monitoring the religious history of more than 5,000 Kenyans over twenty years, in tandem with a randomized experiment (deworming) that has exogenously...

Aggressive behavior against out-group members often rises during periods of economic hardship and health pandemics. Here we test the widespread concern that the Covid-19 crisis may fuel hostility against people from other nations or ethnic minorities. Using a controlled money-burning task, we...

Identifying sources of vaccine hesitancy is one of the central challenges in fighting the Covid- 19 pandemic. In this study, we focus on the role of public misperceptions of doctors' views. Motivated by widespread concern that media reports create uncertainty in how people perceive expert...

Preferences and beliefs about different age groups shape social, political, and economic outcomes. This paper provides strong evidence of “youngism”, which refers to systematic bias in social preferences and unfavorable stereotypes against young adults. Among nationally representative...