|
Center for Strategic and International Studies (United States)
8
|
Environment for Development Initiative (Sweden)
5
|
Mathematica Policy Research (United States)
5
|
|
National Bureau of Economic Research (United States)
5
|
Urban Institute (United States)
5
|
American Enterprise Institute (United States)
4
|
|
Centre for Economic Policy Research (United Kingdom)
2
|
International Institute for Environment and Development (United Kingdom)
2
|
International Institute for Sustainable Development (Canada)
2
|
|
Resources for the Future (United States)
2
|
Brookings Institution (United States)
1
|
Center for American Progress (United States)
1
|
|
Center for Education Policy Analysis (United States)
1
|
Institute for Global Environmental Strategies (Japan)
1
|
