|
National Bureau of Economic Research (United States)
41
|
Mathematica Policy Research (United States)
36
|
Centre for Economic Policy Research (United Kingdom)
17
|
|
International Institute for Environment and Development (United Kingdom)
16
|
RAND Corporation (United States)
15
|
Third Generation Environmentalism (United Kingdom)
14
|
|
Center for Strategic and International Studies (United States)
12
|
Ecologic Institute (Germany)
11
|
Institute for European Environmental Policy (United Kingdom)
8
|
|
Stockholm Environment Institute (Sweden)
8
|
Center for Environmental Research (Germany)
4
|
Environment for Development Initiative (Sweden)
4
|
|
Overseas Development Institute (United Kingdom)
4
|
Wuppertal Institute for Climate, Environment and Energy (Germany)
4
|
Chatham House (United Kingdom)
3
|
|
Science Policy Research Unit (United Kingdom)
3
|
Urban Institute (United States)
3
|
American Enterprise Institute (United States)
2
|
|
Institute for Ecological Economy Research (Germany)
2
|
Brookings Institution (United States)
1
|
