Affiliation: | Tanya Roberts is Economist with the Economic Research Service, United States Department of Agriculture. I thank James K. Hammitt, Harvard University, and Jason F. Shogren, University of Wyoming, for insightful discussions and access to the literature on valuation. David Zorn, Food and Drug Administration, and Chris Dockins and Kelly Maguire, Environmental Protection Agency, provided useful information on valuation methods used for morbidity and mortality in their agencies. |