Committee. Dr. Cohon received his Ph.D. in civil engineering from the Massachusetts Institute of Technology (MIT).

Maureen L. Cropper (Vice Chair) is professor of economics at the University of Maryland, senior fellow at Resources for the Future, former lead economist at the World Bank, and research associate at the National Bureau of Economic Research. Dr. Cropper’s research has focused on valuing environmental amenities (especially environmental health effects), on the discounting of future health benefits, and on the trade-offs implicit in environmental regulations. Her recent research analyzes the externalities associated with motorization and the interaction between residential location, land use, and travel demand. Dr. Cropper is a member of the National Academy of Sciences. She also is past president of the Association of Environmental and Resource Economists and a former chair of the Advisory Council for Clean Air Act Compliance Analysis, a subcommittee of the U.S. Environmental Protection Agency (EPA) Science Advisory Board. Dr. Cropper has served on the advisory boards of Resources for the Future, the Harvard Center for Risk Analysis, the Donald Bren School of the Environment, and the American Enterprise Institute Brookings Center on Regulation. She received her Ph.D. in economics from Cornell University.

Mark R. Cullen is professor of medicine and chief of the division of general internal medicine at Stanford University. His research interests are in occupational and environmental medicine, including isocyanate exposure in automobile shop workers, lung cancer in people exposed to asbestos, and lead toxicity in workers. He has published several textbooks, including Clinical Occupational Medicine and Textbook of Clinical Occupational and Environmental Medicine. He is a member of the DuPont Epidemiology Review Board, a member of the MacArthur Foundation Network on Socioeconomic Status and Health, and a corporate medical director for the Aluminum Company of America. Dr. Cullen is a member of the Institute of Medicine and served as a member of its Board on Health Sciences. He also served as a member of the National Research Council (NRC) Committee on Human Biomonitoring for Environmental Toxicants. Dr. Cullen received his M.D. from Yale University and did his residency in internal medicine.

Elisabeth M. Drake is emeritus staff affiliated with the MIT Energy Initiative. Prior to her retirement in 2001, she served as associate director for new energy technologies at the MIT Energy Laboratory. With other MIT colleagues, she developed an interdisciplinary graduate course on sustainable energy, and she was a co-author of the textbook. Sustainable Energy: Choosing Among Options, published in 2005 by the MIT Press. Her research interests focus on new and emerging energy supply-side and demand-

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