National Bureau of Economic Research (United States)
548
|
Urban Institute (United States)
225
|
RAND Corporation (United States)
175
|
Centre for Economic Policy Research (United Kingdom)
166
|
Brookings Institution (United States)
143
|
Center for Strategic and International Studies (United States)
126
|
Mathematica Policy Research (United States)
125
|
Pembina Institute (Canada)
95
|
Carnegie Endowment for International Peace (United States)
76
|
American Enterprise Institute (United States)
62
|
International Institute for Sustainable Development (Canada)
58
|
Competitive Enterprise Institute (United States)
51
|
Resources for the Future (United States)
47
|
Chatham House (United Kingdom)
38
|
Science Policy Research Unit (United Kingdom)
38
|
Stockholm Environment Institute (Sweden)
30
|
Overseas Development Institute (United Kingdom)
28
|
E3G – Third Generation Environmentalism (United Kingdom)
27
|
Institute for Global Environmental Strategies (Japan)
24
|
Center for Education Policy Analysis (United States)
20
|