|
National Bureau of Economic Research (United States)
423
|
Fraser Institute (Canada)
120
|
RAND Corporation (United States)
106
|
|
Urban Institute (United States)
93
|
Center for Strategic and International Studies (United States)
88
|
Brookings Institution (United States)
59
|
|
Overseas Development Institute (United Kingdom)
26
|
International Institute for Environment and Development (United Kingdom)
21
|
American Enterprise Institute (United States)
7
|
|
Center for Climate and Energy Solutions (United States)
6
|
World Resources Institute (United States)
5
|
Atlantic Council (United States)
4
|
|
Center for American Progress (United States)
4
|
Chatham House (United Kingdom)
4
|
Competitive Enterprise Institute (United States)
4
|
|
Environment for Development Initiative (Sweden)
4
|
Resources for the Future (United States)
3
|
Science Policy Research Unit (United Kingdom)
3
|
|
Carnegie Endowment for International Peace (United States)
2
|
Centre for Economic Policy Research (United Kingdom)
2
|
