1. Introduction / Paul R. Portney and John P. Weyant 2. Discounting, morality, and gaming / Kenneth J. Arrow 3. "Just keep discounting, but. " / Martin L. Weitzman 4. Reconciling philosophy and economics in long-term discounting : comments on Arrow and Weitzman / Michael A. Toman 5. On the uses of benefit-cost reasoning in choosing policy toward global climate change / David F. Bradford 6. A market-based discount rate : comments on Bradford / W. David Montgomery 7. Intergenerational equity, social discount rates, and global warming / Partha Dasgupta, Karl-Goran Maler, and Scott Barrett 8. Substitution and social discount rates : comments on Dasgupta, Maler, and Barrett / V. Kerry Smith 9. Mock referenda for intergenerational decisionmaking / Raymond J. Kopp and Paul R. Portney 10. Intergenerational discounting / Thomas C. Schelling 11. Intergenerational ethics, efficiency, and commitment : comments on Schelling and Kopp and Portney / Jerome Rothenberg 12. Equity, efficiency, and discounting / Alan S. Manne 13. Discounting for the very long term / William R. Cline 14. Models and discount rates : comments on Manne and Cline / Shantayanan Devarajan 15. Discounting and public policies that affect the distant future / William D. Nordhaus 16. The implications of hyperbolic discounting for project evaluation / Maureen Cropper and David Laibson 17. Analysis for intergenerational decisionmaking / Robert C. Lind.