Provider payments are the key determinant of insurance generosity within many health insurance programs covering low-income populations. This paper analyzes the effects of a large, federally-mandated provider payment increase for primary care services provided to low-income elderly and disabled...

The health insurance characteristics of the population changes sharply at age 65 as most people become eligible for Medicare. But do these changes matter for health? We address this question using data on over 400,000 hospital admissions for people who are admitted through the emergency room for...

Doctors and hospitals in the United States serve patients covered by many types of insurance. This overlap in the supply of health care services means that changes in the prices paid or the volume of services demanded by one group of patients may affect other patient groups. This paper examines...

There is much debate about whether the Medicare Prescription Drug Bill -- the greatest expansion of Medicare benefits since its creation in 1965 -- will improve the health of elderly Americans, and how much it will cost. We model how insurance affects medical care utilization, and subsequently,...

Has U.S. health care for the elderly become more equitable during the past several decades? When inequality is measured by Medicare expenditures, the answer is yes. During 1987-2001, low income households experienced an increase of 78 percent ($2624) in per capita expenditures, double the...

In this paper we estimate the returns associated with the provision of coronary artery bypass graft (CABG) surgery, by payer type (Medicare, HMO, etc.). Because reliable measures of prices and treatment costs are often unobserved, we seek to infer returns from hospital entry behavior. We...

Basic economic theory suggests that health insurance coverage may cause a reduction in prevention activities, but empirical studies have yet to provide much evidence to support this prediction. However, in other insurance contexts that involve adverse health events, evidence of ex ante moral...