He is the Bartley P. Cardon Chair of Agribusiness Economics and Policy and professor and extension specialist in the Department of Agricultural & Resource Economics at the University of Arizona. He received his undergraduate and doctoral degrees from the University of California, Berkeley. He has been a Visiting Scholar at India’s National Institute of Rural Development, a Lecturer in the Department of Geography & Environmental Engineering at the Johns Hopkins University, Chief of the Resource Policy Branch at USDA’s Economic Research Service, and a Fellow at the Udall Center for Studies in Public Policy. From 1995-1996, he served as a Senior Economist for the President’s Council of Economic Advisors with responsibility for agricultural, natural resource, and international trade issues. With Bonnie Colby, he edited the book Adaptation and Resilience: The Economics of Climate, Water, and Energy Challenges in the American Southwest. He is currently a principal investigator with the Climate Assessment for the Southwest (CLIMAS) and associate editor for the journal Water Economics and Policy.