|
National Bureau of Economic Research (United States)
30
|
Urban Institute (United States)
26
|
Center for Strategic and International Studies (United States)
22
|
|
RAND Corporation (United States)
17
|
Brookings Institution (United States)
11
|
Atlantic Council (United States)
10
|
|
Mathematica Policy Research (United States)
10
|
Chatham House (United Kingdom)
7
|
Carnegie Endowment for International Peace (United States)
6
|
|
Centre for Economic Policy Research (United Kingdom)
6
|
Institute for Global Environmental Strategies (Japan)
6
|
Danish Institute for International Studies (Denmark)
4
|
|
Resources for the Future (United States)
4
|
Science Policy Research Unit (United Kingdom)
4
|
American Enterprise Institute (United States)
3
|
|
International Institute for Sustainable Development (Canada)
3
|
Stockholm Environment Institute (Sweden)
3
|
Center for Education Policy Analysis (United States)
2
|
|
Overseas Development Institute (United Kingdom)
2
|
Institute for European Environmental Policy (United Kingdom)
1
|
