1. The Natural Capital Project; Stanford University; 371 Serra Mall, Stanford CA 94305 USA
2. The Natural Capital Project, Stanford University; c/o School of Environmental and Forest Sciences, University of Washington, Box 352100; Seattle WA 98195 USA
3. Department of Civil, Environmental and Mechanical Engineering; University of Trento, Via Mesiano; 77 I-38123 Trento Italy
4. The Nature Conservancy; 117 East Mountain Ave Fort Collins CO 80524 USA
5. Sanford School of Public Policy and Department of Economics and Nicholas School of the Environment, Duke University, 302 Towerview; Durham NC 27708 USA