Michael Schlesinger is Professor of Atmospheric Sciences in the Department of Atmospheric Sciences at the University of Illinois, Urbana-Champaign. Haroon Kheshgi is Advanced Research Associate for Corporate Strategic Research at the ExxonMobil Research and Engineering Company. Joel Smith is a Vice President with Stratus Consulting Inc. in Boulder, Colorado. Francisco de la Chesnaye is Chief of the Climate Economics Branch for the United States Environmental Protection Agency, and Vice President for Status Consulting Inc, Boulder, Colorado. John Reilly is the Associate Director for Research in the Joint Program on the Science and Policy of Global Change, and a Senior Research Scientist in the Laboratory for Energy and Environment at the Massachusetts Institute of Technology. Tom Wilson is Principal Project Manager for Climate Change Research at the Electric Power Research Institute (EPRI).