Social scientists continue to devote considerable attention to spillover effects for risky behaviors because of the important policy implications and the persistent challenges in identifying unbiased causal effects. We use the natural experiment of assigned college roommates to estimate peer...

Mental illness stigma refers to negative stereotypes and prejudices about people with mental illness, and is a widespread phenomenon with damaging social, psychological, and economic consequences. Despite considerable policy attention, mental illness stigma does not appear to have declined...

We investigate peer effects in weight gain by exploiting a natural experiment, roommate assignments of 751 male and 845 female first-year college students. Results indicate that females are subject to peer influence in weight gain, with little evidence of peer effects for males. Peer influences...

This study utilizes a natural experiment—conditionally random dormitory assignments of first-year US college students—to investigate the influence of obesogenic environmental factors in explaining changes in weight and exercise behavior during the 2009–2010 academic year. The design...

US adults, regardless of sociodemographic characteristics, report preferences for health gains for children that go well beyond differentials that can be explained by relative life expectancy. Further work is needed to understand the extent to which these findings accurately reflect societal...

This study examines how exercise responds to plausibly exogenous "price shocks," in the form of weather conditions. Most notably, we find that within cold temperature ranges, a decrease in past-month temperature causes a significant decrease in past-month exercise, and this effect is generally...

An important, unresolved question for health policymakers and consumers is whether cigarette smoking in young adulthood has significant lasting effects into later adulthood. The Vietnam era draft lottery offers an opportunity to address this question, because it randomly assigned young men to be...

In United States presidential elections, the incumbent party's fortunes depend significantly on recent economic conditions, as numerous studies have shown. Many details of how economic voting takes place, however, are still not well understood. Here we present evidence on four issues. 1) Which...