FrontMatter -- Preface -- Contents -- Executive Summary -- 1 Introduction -- 2 The Meaning of Value and Use of Economic Valuation in the Environmental Policy Decision-Making Process -- 3 Aquatic and Related Terrestrial Ecosystems -- 4 Methods of Nonmarket Valuation -- 5 Translating Ecosystem Functions to the Value of Ecosystem Services: Case Studies -- 6 Judgment, Uncertainty, and Valuation -- 7 Ecosystem Valuation: Synthesis and Future Directions -- Appendixes -- Appendix A Summary of Related NRC Reports -- Appendix B Household Production Function Models -- Appendix C Production Function Models -- Appendix D Committee and Staff Biographical Information.