|
National Bureau of Economic Research (United States)
548
|
Urban Institute (United States)
291
|
Pembina Institute (Canada)
224
|
|
RAND Corporation (United States)
175
|
Brookings Institution (United States)
171
|
Centre for Economic Policy Research (United Kingdom)
166
|
|
Mathematica Policy Research (United States)
150
|
Center for Strategic and International Studies (United States)
148
|
Competitive Enterprise Institute (United States)
143
|
|
American Enterprise Institute (United States)
80
|
Carnegie Endowment for International Peace (United States)
77
|
Resources for the Future (United States)
65
|
|
International Institute for Sustainable Development (Canada)
58
|
Atlantic Council (United States)
54
|
Chatham House (United Kingdom)
38
|
|
Science Policy Research Unit (United Kingdom)
38
|
Stockholm Environment Institute (Sweden)
36
|
Overseas Development Institute (United Kingdom)
31
|
|
E3G – Third Generation Environmentalism (United Kingdom)
30
|
Institute for Global Environmental Strategies (Japan)
24
|
