Research has shown that higher cost-sharing lowers health care spending levels but less is known about whether cost-sharing also affects spending growth. From 2002 to 2016, private insurance deductibles more than tripled in magnitude. We use data from the Centers for Medicare and Medicaid...

Most health insurance uses cost-sharing to reduce excess utilization. Supplemental insurance can blunt the impact of this cost-sharing, increasing utilization and exerting a negative externality on the primary insurer. This paper estimates the effect of private Medigap supplemental insurance on...

Standard theory suggests that optimal consumer cost-sharing in health insurance increases with the price elasticity of demand, yet publicly-provided drug coverage typically involves uniform cost-sharing across drugs. We investigate how private drug plans set cost-sharing in the context of...