Abstract Although the concept of randomized assignment in order to control for extraneous confounding factors reaches back hundreds of years, the first empirical use appears to have been in an 1835 trial of homeopathic medicine. Throughout the 19 th century there was a growing awareness of the...

Intuitively, we expect that players who are allowed to engage in costless communication before playing a game would be foolish to agree on an inefficient outcome amongst the set of equilibria. At the same time, however, such preplay communication has been suggested as a rationale for expecting...

Bureaucratic performance is a crucial determinant of economic growth. Little is known about how to improve it in resource-constrained settings. This study describes a field trial of a social recognition intervention to improve record keeping in clinics in two Nigerian states, replicating the...

This literature review summarizes the link between psychological well-being and entrepreneurial outcomes for small and medium-size enterprises in fragile, conflict, and violence-affected contexts. It identifies potentially promising, scalable psychosocial training interventions, based on...

Working with the Mexican Ministry of Education, this study piloted a scalable program to reduce high school dropout rates by focusing on socio-emotional skill development and mathematics tutoring. The intervention was evaluated through a randomized field experiment with more than 5,000 youths at...

Mental health, well-being and lasting economic outcomes are intimately connected. However, in geographies marked by fragility, conflict and violence, entrepreneurs of small and medium-size experience chronic stress and poor mental health on a regular basis. This paper describes the incremental...

This paper examines the links between adverse events, depression, and decision making in Nigeria. It investigates how events such as conflicts, shocks, and deaths can affect short-term perceptions of welfare, as well as longer term decisions on economic activities and human capital investments....