Mark Shepard is an assistant professor at Harvard Kennedy School of Government. His main research studies health economics, with a focus on insurance competition and industrial organization issues. His research has studied how adverse selection affects insurers' incentives to cover top academic hospitals in exchanges like those established by the Affordable Care Act. He also has work studying subsidy design and competition in health insurance exchanges and claiming behavior in Social Security. Mark received his PhD in economics from Harvard University in 2015 and was a Post-doctoral Fellow in Aging and Health Economics at the National Bureau of Economic Research in the 2015-16 academic year. Before graduate school, he received an A.B. in applied math from Harvard College (2008) and spent a year working at the Brookings Institution's Engelberg Center for Health Care Reform.