It is often assumed that early life circumstances, in particular before age two, are important for later human capital development. Using experimental variation in the timing of benefits from a conditional cash transfer program, we test the hypothesis that intervention starting in utero and...

We investigate the relationship between HIV, marriage and nonmarital sexual activity, with a focus on adolescent behaviors. We use data from 45 Demographic and Health Surveys to examine how adolescent behavior among women born from 1958 to 1965 are related to the subsequent spread of HIV over...

We describe findings from the first large-scale cluster randomized controlled trial in a developing country that evaluates the uptake of a health-protecting technology, insecticide-treated bednets (ITNs), through micro-consumer loans, as compared to free distribution and control conditions....

The endowment effect, the tendency to value possessions more than non-possessions, is a well known departure from rational choice and has been replicated in numerous settings. We investigate the universality of the endowment effect, its evolutionary significance, and its dependence on...

This paper examines how schools' choices of class size and households' choices of schools affect regression-discontinuity-based estimates of the effect of class size on student outcomes. We build a model in which schools are subject to a class-size cap and an integer constraint on the number of...