|
Brookings Institution (United States)
21
|
National Bureau of Economic Research (United States)
17
|
Centre for Economic Policy Research (United Kingdom)
12
|
|
Fraser Institute (Canada)
7
|
Resources for the Future (United States)
7
|
Urban Institute (United States)
7
|
|
Center for Strategic and International Studies (United States)
6
|
Mathematica Policy Research (United States)
4
|
Carnegie Endowment for International Peace (United States)
3
|
|
Energy Policy Research Group (United Kingdom)
3
|
American Enterprise Institute (United States)
2
|
Center for Education Policy Analysis (United States)
2
|
|
Chatham House (United Kingdom)
2
|
Earth Institute (United States)
2
|
International Institute for Environment and Development (United Kingdom)
2
|
|
Bruegel (Belgium)
1
|
Centre for European Policy Studies (Belgium)
1
|
Centre for International Governance Innovation (Canada)
1
|
|
Environment for Development Initiative (Sweden)
1
|
International Institute for Sustainable Development (Canada)
1
|
