An economic historian, he is the John French Professor of Economics at Dartmouth College, one of the eight Ivy League universities in the United States, and a research fellow at the National Bureau of Economic Research (NBER). He previously taught at the University of Chicago Booth School of Business and served as an economist for the Federal Reserve and the President's Council of Economic Advisers. He has published seven books on U.S. economics and trade policy, making him a leading authority in the field. He is also a frequent contributor to The Economist, The Wall Street Journal, The New York Times, and The Financial Times.