Mark J. Mazur is vice president for tax policy and 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.
Find an Expert by Topic
Vice President, Tax Policy
William G. Gale is the Arjay and Frances Miller Chair in Federal Economic Policy in the Economic Studies Program at the Brookings Institution. His research focuses on tax policy, fiscal policy, pensions and saving behavior. He is co-director of the Tax Policy Center, a joint venture of the Brookings Institution and the Urban Institute. He is also director of the Retirement Security Project. From 2006 to 2009, he served as vice president of Brookings and director of the Economic Studies Program.
Prior to joining Brookings in 1992, he was an assistant professor in the Department of Economics at the University of California, Los Angeles, and a senior economist for the Council of Economic Advisers under President George H.W. Bush.
He is the co-editor of several books, including Automatic: Changing the Way America Saves (Brookings 2009); Aging Gracefully: Ideas to Improve Retirement Security in America (Century Foundation, 2006); The Evolving Pension System: Trends, Effects, and Proposals for Reform(Brookings, 2005); Private Pensions and Public Policy (Brookings, 2004); Rethinking Estate and Gift Taxation (Brookings, 2001), and Economic Effects of Fundamental Tax Reform (Brookings, 1996).
His research has been published in several scholarly journals, including the American Economic Review, Journal of Political Economy, and Quarterly Journal of Economics. In 2007, a paper he co-authored was awarded the TIAA-CREF Paul A. Samuelson Award Certificate of Excellence.
He has also written extensively in policy-related publications and newspapers, including op-eds in CNN, the Financial Times, Los Angeles Times, New York Times, Wall Street Journal, and Washington Post.
Gale serves on the editorial board of several academic journals, and has served on advisory boards for the Government Accountability Office, the Internal Revenue Service, and the Joint Committee on Taxation, and on the Board of the Center on Federal Financial Institutions.
Gale attended Duke University and the London School of Economics and received his Ph.D. from Stanford University in 1987. He lives in Washington, DC, is an avid tennis player, and is a person who stutters. He is the father of two grown children.
Howard Gleckman is a senior fellow in the Urban-Brookings Tax Policy Center at the Urban Institute, where he edits the fiscal policy blog TaxVox and the daily news summary The Daily Deduction. He is also affiliated with Urban’s Program on Retirement Policy, where he works on long-term care issues.
Before joining Urban, Gleckman was senior correspondent in the Washington bureau of Business Week, where he was a 2003 National Magazine Award finalist. He was a 2006–07 media fellow at the Kaiser Family Foundation and a visiting fellow at the Center for Retirement Research at Boston College from 2006 to 2008.
Gleckman writes two regular columns for Forbes.com, on tax policy and elder care. He is author of the book Caring for Our Parents and speaks and writes frequently on long-term care issues.
Senior Research Associate
Joseph Rosenberg is a senior research associate in the Urban-Brookings Tax Policy Center at the Urban Institute, where his research focuses primarily on issues of federal taxation, including business and corporate taxation, broad-based consumption taxes, tax expenditures, and tax incentives for charitable giving. He also develops and maintains the Tax Policy Center’s microsimulation model of the federal tax system, which is regularly used to produce analyses of the revenue and distributional impacts of federal tax policy that are broadly cited by policymakers and the press.
Before joining Urban, Rosenberg worked at the Board of Governors of the Federal Reserve System in Washington, DC, and was a PhD candidate in economics at the University of California, Berkeley.
Urban Institute Associate
Roberton (Bob) Williams is an Urban Institute associate at the Urban-Brookings Tax Policy Center at the Urban Institute, where he focuses on communicating the Tax Policy Center’s broad range of work through papers, blog posts on TaxVox, extensive interaction with the media, and a broad range of features on the website. Twice given the Urban Institute President’s Award for Communication, Williams has spearheaded the Tax Policy Briefing Book, overseen development of interactive tax returns and four Tax Policy Center tax calculators, and written the popular whiteboard video, “Debunking Myths about Who Pays No Federal Income Tax.” He appears frequently in TV and radio interviews, and is often cited in news articles on tax issues.
Before joining Urban, Williams was at the Congressional Budget Office from 1984 through 2006, most recently as deputy assistant director for tax analysis; before that, he was an assistant professor of economics at Williams College. He has written numerous papers on tax policy, income distribution, and social welfare programs.
Williams earned his undergraduate and doctoral degrees in economics at Harvard University.
Kim Rueben, a senior fellow in the Urban-Brookings Tax Policy Center at the Urban Institute, is an expert on state and local public finance and the economics of education. Her research examines state and local tax policy, fiscal institutions, state and local budgets, issues of education finance, and public-sector labor markets. Rueben directs the State and Local Finance Initiative. Her current projects include work on state budget shortfalls, financing options for California, the fiscal health of cities, and examining higher education tax credits and grants. She serves on a Council of Economic Advisors for the Controller of the State of California and a National Academy of Sciences panel on the economic and fiscal consequences of immigration, and she was on the DC Tax Revision Commission in 2013. In addition to her position at Urban, Rueben is an adjunct fellow at the Public Policy Institute of California (PPIC).
Before joining Urban, Rueben was a research fellow at the PPIC. She has served as an adjunct professor at the Georgetown University Public Policy Institute and the Goldman School of Public Policy at the University of California, Berkeley; as a visiting scholar at the San Francisco Federal Reserve Bank; and as a member of the executive board of the American Education Finance Association.
Rueben received a BS in applied math-economics from Brown University, an MS in economics from the London School of Economics, and a PhD in economics from the Massachusetts Institute of Technology.
Tracy Gordon is a senior fellow with the Urban-Brookings Tax Policy Center, where she researches and writes about fiscal challenges facing state and local governments, including budget trade-offs, intergovernmental relations, and long-term sustainability. Before joining Urban, Gordon was a senior economist with the White House Council of Economic Advisers. She was also a fellow at the Brookings Institution, assistant professor at the University of Maryland School of Public Policy, and fellow at the Public Policy Institute of California. Gordon was a member of the District of Columbia Infrastructure Task Force and the District of Columbia Tax Revision Commission. She serves on the board of trustees for the American Tax Policy Institute and the National Tax Association.
Gordon has written extensively on state and local government finances, including taxes, budgeting, intergovernmental relations, municipal debt, and pensions. She has appeared in the New York Times, Wall Street Journal, and Washington Post and on C-SPAN, Fox Business News, and NPR. Recent publications include Assessing Fiscal Capacities of States: A Representative Revenue System–Representative Expenditure System Approach (with Richard Auxier and John Iselin); "The Federal Stimulus Programs and Their Effects" (with Gary Burtless) in The Great Recession; "State and Local Fiscal Institutions in Recession and Recovery" in the Oxford Handbook on State and Local Government Finance; and "Addressing Local Fiscal Disparities" in the Oxford Handbook of Urban Economics and Planning. Gordon holds a PhD in public policy with a concurrent MA in economics from the University of California, Berkeley.
Steve Rosenthal, a senior fellow in the Urban-Brookings Tax Policy Center at the Urban Institute, researches, speaks, and writes on a range of federal income tax issues, with a particular focus on business taxes. In 2013, he also was the staff director of the DC Tax Revision Commission.
Before joining Urban, Rosenthal practiced tax law in Washington, DC, for over 25 years, most recently as a partner at Ropes and Gray. He was a legislation counsel with the Joint Committee on Taxation, where he helped draft tax rules for financial institutions, financial products, capital gains, and related areas. He is the former chair of the Taxation Section of the District of Columbia Bar Association.
Rosenthal holds an AB and JD from the University of California, Berkeley, and an MPP from Harvard University.
Frank Sammartino is a senior fellow at the Urban-Brookings Tax Policy Center and an affiliate of Urban’s State and Local Finance Initiative. His current work focuses on the interaction among federal, state, and local tax policies and on the influence of tax and transfer policies on income inequality.
Sammartino has written extensively about federal tax and retirement policy issues. In an earlier stint at Urban, he designed and developed the initial version of the Tax Policy Center microsimulation model, which researchers use to analyze how federal tax policies affect federal revenues and families at different income levels. He also led a team of researchers in developing a new version of the Dynamic Simulation of Income Model, which Urban researchers use to analyze how public policies and economic and demographic forces shape retirement income security.
Before returning to Urban, Sammartino completed a 20-year career at the Congressional Budget Office, serving most recently as the assistant director for tax analysis. He also has served as chief economist and deputy director at the Joint Economic Committee of the US Congress.
Sammartino holds undergraduate and graduate degrees in economics from Boston College and the University of Wisconsin–Madison, respectively.