R. Glenn Hubbard is the Dean and Russell L. Carson Professor of Finance and Economics in the Graduate School of Business at Columbia University and Professor of Economics in Columbia's Faculty of Arts and Sciences. He is also a research associate of the National Bureau of Economic Research and a director of Automatic Data Processing, Black Rock Closed-End Funds, Dex Media, Duke Realty, KKR Financial Corporation, and Ripplewood Holdings. He received his Ph.D. in economics from Harvard University in 1983. From 2001–2003, he served as Chairman of the White House Council of Economic Advisers, and from 1991–1993, he was Deputy Assistant Secretary of the U.S. Treasury Department. Glenn Hubbard's fields of specialization are public economics, financial markets and institutions, corporate finance, macroeconomics, industrial organization, and public policy. He is the author of more than 90 articles in leading journals, including the American Economic Review, Journal of Finance, Journal of Financial Economics, Journal of Political Economy, Journal of Public Economics, Quarterly Journal of Economics, RAND Journal of Economics, and Review of Economics and Statistics. His research has been supported by grants from the National Science Foundation, the National Bureau of Economic Research, and numerous private foundations.