Treatment practices vary widely across hospitals, often with little connection to the medical needs of patients. We assess impacts of these differences in childbirth, where there is broad interest in reducing cesarean deliveries. Using a distance-based design and data from half a million births,...

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...