|
International Institute for Applied Systems Analysis (Austria)
18
|
Centre for Economic Policy Research (United Kingdom)
14
|
National Bureau of Economic Research (United States)
4
|
|
RAND Corporation (United States)
3
|
Brookings Institution (United States)
1
|
Center for Environmental Research (Germany)
1
|
|
Centre for International Governance Innovation (Canada)
1
|
Resources for the Future (United States)
1
|
