The first strand of Mark’s research has focused on the economics of the health care sector, including especially the pharmaceutical, hospital, and health insurance industries. The second strand of his research has examined the impact of large-scale government expenditure programs such as Social Security, Medicare, and Medicaid.
His research has been published in leading academic journals including the American Economic Review, the Journal of Political Economy, and the Quarterly Journal of Economics and has been featured in many media outlets including The Economist, The New York Times, and The Wall Street Journal. His research has been funded by the National Science Foundation, the National Institute of Health, the Social Security Administration, the Robert Wood Johnson Foundation, and the Alfred P. Sloan Foundation.