Analyzing data spanning three decades covering the near universe of births, we study county-level differences in Cesarean section (C-section) rates among first-time mothers of singleton births. Our research reveals persistent geographic variation in C- section rates for both low- and high-risk...

Hospital treatment practices vary widely, often with little connection to the medical needs of patients. We assess the impact of these differences in the context of childbirth. We focus on low-risk first births, where cesarean delivery rates vary enormously across hospitals, and where...

Cesarean delivery for low-risk pregnancies is generally associated with worse health outcomes for infants and mothers. The interpretation of this correlation, however, is confounded by potential selectivity in the choice of birth mode. We use birth records from California, merged with hospital...

We study a 2008 policy reform in which Medicare revised its hospital payment system to better reflect patients' severity of illness. We construct a simulated instrument that predicts a hospital's policy-induced change in reimbursement using pre-reform patients and post-reform rules. The reform...

We study impacts of a cash transfer program with no means-test and no work restrictions: the US Department of Veteran Affairs (VA) Disability Compensation program. Our empirical strategy leverages quasi-random assignment of veterans claiming mental disorder disability to examiners who vary in...