Research

"Ridesharing and External-Cause Mortality" (with Keith Teltser and Conor Lennon) Under Review

Existing research suggests ridesharing affects transportation access, substance use, and exposure to crime. Ridesharing may therefore also have meaningful effects on mortality related to these underlying factors. To address this question, we use restricted-access data from the National Vital Statistics System to study how UberX, Uber's taxi-like service, affects mortality from external causes. Our identification strategy relies on spatial and temporal variation in UberX entry across U.S. counties. Among those aged 18 to 45, we find that UberX entry into an area is associated with 2.01 additional deaths per quarter per 100,000 population (roughly a 10% increase). We find that these deaths are primarily related to alcohol and drug use. We support a causal interpretation for our findings by presenting event studies, placebo analyses, sensitivity and heterogeneity analyses, and a variety of robustness checks, including differences-in-differences estimators that are robust to heterogeneous treatment effects. Our work contributes to the literature by addressing both the benefits and costs of ridesharing, and by informing stakeholders who are interested in the cumulative impact of ridesharing on public health and well-being.

"Pharmaceutical Drug Regulation and Mortality: The Peculiar Case of E-cigarettes" (with Michael Pesko)

"Emotional Cues and Risky Decisions: Evidence from the Super Bowl"

"Ridesharing and Sexual Violence"