Milken Institute - Department of Environmental and Occupational Health, Concurrent Technologies Corporation, George Washington University, George Washington University and George Washington University - School of Public Health and Health Services (SPHHS)

George Washington University, Washington University in St. Louis - D.C. Satellite Office, University of Kentucky - Department of Economics, affiliation not provided to SSRN, George Washington University - Trachtenberg School of Public Policy and Public Administration, George Washington Institute of Public Policy (GWIP), Cox Associates, Inc., Resources for the Future, Indiana University Bloomington - School of Public & Environmental Affairs (SPEA), George Washington University, Harvard University, Indiana University Bloomington - School of Public & Environmental Affairs (SPEA), University of Virginia - Frank Batten School of Leadership and Public Policy, George Washington University, Rutgers, The State University of New Jersey - Edward J. Bloustein School of Planning and Public Policy, Marsh & McLennan Companies - Washington, D.C. Office, Vanderbilt University - Law School and University of Washington - Daniel J. Evans School of Public Affairs