|
Brookings Institution (United States)
54
|
RAND Corporation (United States)
37
|
Center for Strategic and International Studies (United States)
14
|
|
Fraser Institute (Canada)
7
|
American Enterprise Institute (United States)
5
|
E3G – Third Generation Environmentalism (United Kingdom)
2
|
|
Potsdam Institute for Climate Impact Research (Germany)
2
|
Wuppertal Institute for Climate, Environment and Energy (Germany)
1
|
