Mark J. Mazur is the Robert C. Pozen director of the Urban-Brookings Tax Policy Center. His research interests cover all aspects of tax policy. From 2012 until early 2017, he was the assistant secretary for tax policy at the US Department of the Treasury. Mazur served in the federal government for 27 years in various positions, including policy economist at the congressional Joint Committee on Taxation, senior economist at the President’s Council of Economic Advisers; senior director at the National Economic Council; chief economist and senior policy adviser and director of policy at the US Department of Energy; acting administrator of the Energy Information Administration; director of research, analysis, and statistics at the Internal Revenue Service; and deputy assistant secretary for tax analysis in the Office of Tax Policy. Before entering public service, Mazur was an assistant professor in Heinz College at Carnegie-Mellon University. He has a bachelor’s degree in financial administration from Michigan State University and a master’s degree in economics and a PhD in business from Stanford University.