1. Development Strategy and Governance Division; International Food Policy Research Institute (IFPRI); 2033 K St. NW Washington D.C. 20006
2. Department of Civil, Environmental, and Architectural Engineering; University of Colorado; Boulder CO
3. Environment and Production Technology Division; International Food Policy Research Institute (IFPRI); 2033 K St. NW Washington D.C. 20006
4. MIT Joint Program on the Science and Policy of Global Change; Center for Global Change Science; 77 Massachusetts Avenue, 54-1312 Cambridge MA 02139