[1] Stanford Univ, Stanford, CA 94305 USA
[2] NYU, New York, NY USA
[3] Univ Massachusetts, Amherst, MA 01003 USA
[4] Brown Univ, Providence, RI 02912 USA
[5] Univ Calif San Diego, San Diego, CA 92103 USA
[6] Yale Univ, New Haven, CT USA
[7] Univ Chicago, Chicago, IL 60637 USA
[8] World Bank, 1818 H St NW, Washington, DC 20433 USA
[9] Arizona State Univ, Tempe, AZ USA
[10] Columbia Univ, New York, NY USA
[11] Univ Calif Berkeley, Berkeley, CA 94720 USA
[12] Northwestern Univ, Evanston, IL USA
[13] Univ Miami, Coral Gables, FL 33124 USA
[14] Resources Future Inc, 1616 P St NW, Washington, DC 20036 USA
[15] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA
[16] Tufts Univ, Medford, MA 02155 USA
[17] Georgia Inst Technol, Atlanta, GA 30332 USA
[18] MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA
[19] Elect Power Res Inst, Palo Alto, CA USA
[20] Iowa State Univ, Ames, IA USA
[21] Harvard Univ, Cambridge, MA 02138 USA
[22] Univ Sussex, Falmer, England
[23] Vrije Univ Amsterdam, Amsterdam, Netherlands