We examine the relationship between contemporaneous fine particulate matter exposure and COVID-19 morbidity and mortality using an instrumental variable approach based on wind direction. Harnessing daily changes in county-level wind direction, we show that arguably exogenous fluctuations in...

In 2016, the Surgeon General used longitudinal cohort studies to conclude that youth e-cigarette use is strongly associated with cigarette use. We re-evaluate data from the period of time before the writing of the Surgeon General report, using quasi-experimental methods, and reach the opposite...

Over the past decade, rising youth use of e-cigarettes and other electronic nicotine delivery systems (ENDS) has contributed to aggressive regulation by state and local governments. Between 2010 and mid-2019, ten states and two large counties adopted ENDS taxes. We use two large national surveys...

This study examines the long-term link between in-utero cigarette taxes and adult prenatal smoking. We use U.S. birth certificate records to demonstrate that exposure to higher in-utero cigarette taxes (over 1965-2001) reduces later-life adult pre-pregnancy and prenatal smoking. We also show...

Legal abortion has recently been suggested as an essential healthcare service. In this study, we consider whether abortion legalization over 1969-1973 improved women's health, measured by maternal mortality. Our event-study results indicate that legal abortion substantially lowered non-white...