Agricultural policy, natural resources policy, welfare economics

Current research interests include U.S.-European agricultural trade and policy, NAFTA, GATT negotiations, and comparative soil and water conservation policies.

His recent publications are in Foreign Affairs, American Journal of Agricultural Economics, and Land Economics, a 1992 book, Reforming Farm Policy: Toward a National Agenda, with Willard W. Cochrane, and a 1994 book, Freer Trade, Protected Environment, with Philip Vande Kamp and Francois Ortalo-Magne. His most recent journal article was co-authored with David G. Victor, "Farming the Genetic Frontier," Foreign Affairs, v.81, no.3, May/June 2002.