|
Fraser Institute (Canada)
172
|
The Green Political Foundation (Germany)
56
|
Brookings Institution (United States)
49
|
|
Peterson Institute for International Economics (United States)
39
|
American Enterprise Institute (United States)
20
|
Resources for the Future (United States)
12
|
|
Atlantic Council (United States)
3
|
Ashoka Trust for Research in Ecology and the Environment (India)
1
|
International Institute for Sustainable Development (Canada)
1
|
|
Stockholm Environment Institute (Sweden)
1
|
Urban Institute (United States)
1
|
