718 Huntington Avenue
Boston, MA 02115
Phone: 617.432.4343

Other Affiliations

Harvard Center for Risk Analysis

Harvard Environmental Economics Program

Center for Health Decision Sciences, Harvard T.H. Chan School of Public Health

Toulouse School of Economics


Professor Hammitt’s research concerns the development and application of quantitative methods—including benefit-cost, decision, and risk analysis—to health and environmental policy. Topics include management of long-term environmental issues with important scientific uncertainties, such as global climate change and stratospheric-ozone depletion, evaluation of ancillary benefits and countervailing risks associated with risk-control measures, and characterization of social preferences over health and environmental risks using revealed-preference, stated-preference, and health-utility methods. He has served on six National Academies of Sciences panels, more than a dozen advisory committees to the U.S. Environmental Protection Agency and other government agencies, is a fellow of the Society for Risk Analysis, and in 2015 received the SRA’s Distinguished Achievement Award for “for extraordinary achievement in science or public policy relating to risk analysis.”


A.B. magna cum laude, 1978, Applied Mathematics, Harvard College
Sc.M., 1978, Applied Mathematics, Harvard University
M.P.P., 1981, Kennedy School of Government, Harvard University
Ph.D., 1988, Public Policy, Harvard University