He studies a range of issues in energy and environmental economics, with a focus on markets for automobiles and the fuels they use, including oil, gasoline, and biofuels. He holds a Ph.D. in economics from the University of Michigan and a B.A. in economics from Macalester College. His research has been published in the American Economic Review, Journal of Environmental Economics and Management, and Journal of Industrial Economics. He is appointed as a Research Associate at the National Bureau of Economic Research, and he serves on the Editorial Board at the Journal of Environmental Economics and Management. He previously served as a visiting researcher at the Energy Institute at Haas at UC Berkeley, as a staff economist with the White House Council of Economic Advisers, and as a research assistant at Resources for the Future.