|
Competitive Enterprise Institute (United States)
86
|
Urban Institute (United States)
66
|
Atlantic Council (United States)
46
|
|
Pembina Institute (Canada)
42
|
Brookings Institution (United States)
28
|
Resources for the Future (United States)
18
|
|
International Institute for Strategic Studies (United Kingdom)
9
|
Mathematica Policy Research (United States)
8
|
World Resources Institute (United States)
4
|
|
Frontier Centre for Public Policy (Canada)
3
|
Overseas Development Institute (United Kingdom)
3
|
Third Generation Environmentalism (United Kingdom)
3
|
|
E3G – Third Generation Environmentalism (United Kingdom)
2
|
International Institute for Environment and Development (United Kingdom)
2
|
Stockholm Environment Institute (Sweden)
2
|
|
Adam Smith Institute (United Kingdom)
1
|
American Enterprise Institute (United States)
1
|
Carnegie Endowment for International Peace (United States)
1
|
|
Information and Communication Technologies for Development (United Kingdom)
1
|
International Institute for Sustainable Development (Canada)
1
|
