Mark A. Calabria was director of financial regulation studies at the Cato Institute. Before joining Cato in 2009, he spent six years as a member of the senior professional staff of the U.S. Senate Committee on Banking, Housing, and Urban Affairs. In that position, Calabria handled issues related to housing, mortgage finance, economics, banking and insurance for Ranking Member Richard Shelby (R-AL). Prior to his service on Capitol Hill, Calabria served as deputy assistant secretary for regulatory affairs at the U.S. Department of Housing and Urban Development, and also held a variety of positions at Harvard University’s Joint Center for Housing Studies, the National Association of Home Builders, and the National Association of Realtors. Calabria has also been a research associate with the U.S. Census Bureau’s Center for Economic Studies. He has extensive experience evaluating the impacts of legislative and regulatory proposals on financial and real estate markets, with particular emphasis on how policy changes in Washington affect low‐ and moderate‐income households. He holds a doctorate in economics from George Mason University.