Billions of dollars have been spent on pilot programs searching for ways to reduce healthcare costs. I study one such program, where hospitals pay doctors bonuses for reducing the total hospital costs of admitted Medicare patients (a "bundled payment"). Doctors respond to the bonuses by becoming...

We examine how supply-side health insurance generosity affects patient access, use, and health. Exploiting large, exogenous changes in Medicaid reimbursement rates for physicians, we find that increasing payments for new patient office visits reduces reports of providers turning away...

Car exhaust is a major source of air pollution, but little is known about its impacts on population health. We exploit the dispersion of emissions-cheating diesel cars - which secretly polluted up to 150 times as much as gasoline cars - across the United States from 2008-2015 as a natural...

We examine how the amount a physician is paid influences who they are willing to see. Exploiting large, exogenous changes in Medicaid reimbursement rates, we find that increasing payments for new patient office visits reduces reports of providers turning away beneficiaries: closing the gap in...

Car exhaust is a major source of air pollution, but little is known about its impacts on population health. We exploit the dispersion of emissions-cheating diesel cars−which secretly polluted up to 150 times as much as gasoline cars−across the United States from 2008-2015 as a natural...