We exploit a policy change in Sweden to estimate the effect of copayments on the demand for children's and adolescents' usage of medical care. To this end, we use population-wide registry data including detailed characteristics of individuals and their medical visits. We examine whether the...

This paper examines the impact of coinsurance exemption for prescription medicines applied to elderly individuals in Spain after retirement. To evaluate this coinsurance change we use a rich administrative dataset that links pharmaceutical consumption and hospital discharge records for the full...

I exploit the age-based eligibility structure of Medicare and the age gap between spouses to examine the impact of Medicare eligibility of an older spouse on the insurance coverage of younger, Medicare-ineligible spouses. Using a regression discontinuity framework, I find that Medicare...

We study optimal risk adjustment in imperfectly competitive health insurance markets when high-risk consumers are less likely to switch insurer than low-risk consumers. First, we find that insurers still have an incentive to select even if risk adjustment perfectly corrects for cost differences...

We estimate an insurer-specific preference function which rationalizes hospital referrals for privately insured births in California. The function is additively separable in: a hospital price paid by the insurer, the distance traveled, and plan- and severity-specific hospital fixed effects...

Community-rating regulations equalize the insurance premiums faced by the healthy and the unhealthy. Intended reductions in the unhealthy's premiums can be undone, however, if the healthy forgo coverage. The severity of this adverse selection problem hinges largely on how health care costs are...

This paper shows how in Medicare Part D insurers' gaming of the subsidy paid to low-income enrollees distorts premiums and raises the program cost. Using plan-level data from the first five years of the program, I find multiple instances of pricing strategy distortions for the largest insurers....

As health insurance becomes available outside of the employment relationship as a result of the Affordable Care Act (ACA), the cost of applying for Social Security Disability Insurance (SSDI)–potentially going without health insurance coverage during a waiting period totaling 29 months from...

I use the Medicare Part D prescription drug insurance market to examine the dynamics of firm interaction with consumers on an insurance exchange. Enrollment data show that consumers face switching frictions leading to inertia in plan choice, and a regression discontinuity design indicates...

We study a policy aimed at increasing the level of information on medical malpractice costs and the risk exposure of local public healthcare providers. The policy is based on enhanced monitoring of medical malpractice claims by the level of government that rules providers in a multilevel...