|
Brookings Institution (United States)
2
|
Energy Studies Institute (Singapore)
2
|
Environment for Development Initiative (Sweden)
2
|
|
Centre for Economic Policy Research (United Kingdom)
1
|
International Institute for Applied Systems Analysis (Austria)
1
|
International Institute for Sustainable Development (Canada)
1
|
|
National Bureau of Economic Research (United States)
1
|
Resources for the Future (United States)
1
|
