Gilbert E. Metcalf is Professor of Economics at Tufts University and a Research Associate at the National Bureau of Economic Research. He is also a research associate at the Joint Program on the Science and Policy of Global Change at MIT. His current research focuses on policy evaluation and design in the area of energy and climate change. He has published papers in numerous academic journals, has edited two books, and has contributed chapters to several books on tax policy. Metcalf received a B.A. in mathematics from Amherst College, an M.S. in agricultural and resource economics from the University of Massachusetts Amherst, and a Ph.D. in economics from Harvard University.