Risk classification refers to the use of observable characteristics by insurers to group individuals with similar expected claims, compute the corresponding premiums, and thereby reduce asymmetric information. With perfect risk classification, premiums fully reflect the expected cost associated...

The Affordable Care Act greatly expanded subsidized health insurance opportunities for low-income childless women through Medicaid and the Marketplace. This insurance provides better access to prescription-based contraception, which could reduce the number of births. At the same time, it lowers...

This paper studies a market for a medical product in which there is perfect competition among health insurers, while the good is sold by a monopolist. Individuals differ in their severity of illness and there is ex post moral hazard. We consider two regimes: one in which insurers use coinsurance...

This paper studies a market for a medical product in which there is perfect competition among health insurers, while the good is sold by a monopolist. Individuals differ in their severity of illness and there is ex post moral hazard. We consider two regimes: one in which insurers use coinsurance...

A common misunderstanding of moral hazard emerges from an inaccurate definition of health-care insurance. What we call health insurance is actually a bundle of two services — insurance for catastrophic care and subsidies for routine care. The insurance portion covers insurable medical events...

Health insurance premiums often do not reflect individual health risks, implying redistribution from individuals with low health risks to individuals with high health risks. This paper studies whether more cost-sharing leads to less redistribution and to lower welfare of high-risk individuals....

Social health insurance systems can be designed with different levels of state involvement and varying degrees of redistribution. In this article we focus on citizens’ preferences regarding the design of their health insurance coverage including the extent of redistribution. Using a...

We present and empirically implement an equilibrium labor market search model where risk averse workers facing medical expenditure shocks are matched with firms making health insurance coverage decisions. Our model delivers a rich set of predictions that can account for a wide variety of...

Many criticisms of Medicare and Social Security have suggested that beneficiaries get more than they paid into the system over their lifetimes and these entitlement programs may be unsustainable if they are insufficiently funded. But studies do not always use appropriate assumptions for...