We document and analyze the emergence of a substantial gender gap in mathematics in the early years of schooling using a large, recent, and nationally representative panel of US children. There are no mean differences between boys and girls upon entry to school, but girls lose more than...

Within a field experiment, I present a treatment group with reductions in information, administrative, stigma, and procrastination costs associated with the Advance EITC. The treatment increases Advance participation from 0.3 to 1.2 percent. Another treatment simultaneously encourages 401(k)...

Success in slowing obesity trends would benefit from policies aimed at reducing calorie consumption. In a field experiment at a fast-food sandwich chain, we address the effects of providing calorie information, mimicking recent legislation, and test an alternative approach that makes ordering...

In this paper, we demonstrate that, in a context where peer groups do not overlap fully, it is possible to identify all the relevant parameters of the standard linear-in-means model of social interactions. We apply this novel identification structure to study peer effects in the choice of...

Mid-twentieth century malaria eradication campaigns largely eliminated malaria from Paraguay and Sri Lanka. Using these interventions as quasi-experiments, I estimate malaria's effect on lifetime female educational attainment through the combination of pre-existing geographic variation in...

We use a regression discontinuity design to examine students' responses to being placed on academic probation. Consistent with a model of introducing performance standards, we find that being placed on probation at the end of the first year discourages some students from returning to school...

This paper studies the contribution of sulfa drugs, a groundbreaking medical innovation in the 1930s, to declines in US mortality. For several infectious diseases, sulfa drugs represented the first effective treatment. Using time-series and difference-in-differences methods, we find that sulfa...