The cost of efforts to expand health insurance coverage to the currently uninsured increases when people who would otherwise purchase private insurance obtain subsidized public coverage. Legislators are increasingly interested in mechanisms that target insurance benefits to those who need them...

During the 1990s many states extended Medicaid eligibility to low-income parents who were not receiving welfare. We evaluate the effects of those expansions on health insurance coverage. To account for unobservable differences between expansion states and non-expansion states that may be...

The Medicare program transfers more than $200 billion annually from taxpayers to beneficiaries. This paper considers the incidence of such transfers. First, we examine the net tax payments and program expenditures for individuals in different lifetime income groups. We find Medicare has led to...

The Medicare program of health care for the aged now costs more than $5,000 per enrollee, a national cost of more than $200 billion a year. The official projections that these costs will rise rapidly from 2.5% of GDP now to 5.5% of GDP in 2030 and 7% of GDP in 2070 assume that structural changes...

This study examines the effect of a Medicaid disenrollment on employment, sources of health insurance coverage, health, and health care utilization of childless adults using longitudinal data from the 2004 Panel of the Survey of Income and Program Participation. From July through September 2005,...

We use the increases in health insurance coverage at age 65 generated by the rules of the Medicare program to evaluate the effects of health insurance coverage on health related behaviors and outcomes. The rise in overall coverage at age 65 is accompanied by a narrowing of disparities across...

We describe the Medicaid eligibility rules for the elderly. Medicaid is administered jointly by the Federal and state governments, and each state has significant flexibility on the details of the implementation. We document the features common to all states, but we also highlight the most...

In 2008, a group of uninsured low-income adults in Oregon was selected by lottery for the chance to apply for Medicaid. We use this randomized design and 2009 administrative data to evaluate the effect of Medicaid on labor market outcomes and participation in other social safety net programs. We...

We demonstrate Medicare's influence on private insurers' payments for physicians' services. Using a large administrative change in payments for surgical versus medical care, we find that private prices follow Medicare's lead. A $1 change in Medicare's fees moved private prices by $1.16. A second...

The 2010 Affordable Care Act (ACA) Medicaid expansions aimed to improve access to care and health status among low-income non-elderly adults. Previous work has established a link between Medicaid coverage expansion and reduced mortality (Sommers, Baicker and Epstein, 2012), but the mechanism of...