Gary Yohe is the Huffington Foundation Professor of Economics and Environmental Studies, Emeritus, at Wesleyan University in Connecticut. Richard Richels directed climate change research at the Electric Power Research Institute (EPRI). He also served on the National Assessment Synthesis Team for the first US National Climate Assessment. Henry D. Jacoby is the William F. Pounds Professor of Management, Emeritus in the M.I.T. Sloan School of Management and former co-director of the M.I.T. Joint Program on the Science and Policy of Global Change.