1. a Desert Research Institute , Reno , NV , USA
2. b The World Bank , Washington , DC , USA
3. c Peking University , Beijing , China
4. d Civic Exchange , Hong Kong , China
5. e The LEVON Group, Thousand Oaks , CA , USA
6. f University of California at Riverside, Riverside , CA , USA
7. g Massachusetts Institute of Technology , Cambridge , MA , USA