Primary care physicians have a central, coordination role in medicine, yet little is known about their impacts on healthcare utilization. I study the short-run and long-run effects of switching to different primary care physicians on utilization in terms of spending among Medicare patients over...

This paper examines, theoretically and empirically, how changes in the demand for health insurance and medical services in the non-Medicare population -- coverage eligibility changes for parents and the firm size composition of employment – spill over and affect health insurance coverage and...

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...

Not a single COVID-19 crisis standard of care allocation plan suggests that life-saving critical care resources should go first to those able to pay or to the oldest in need. Yet, every day we ration healthcare in the United States, and with limited exceptions, care is rationed based on ability...