|
Environment for Development Initiative (Sweden)
84
|
International Institute for Applied Systems Analysis (Austria)
29
|
Resources for the Future (United States)
15
|
|
Overseas Development Institute (United Kingdom)
6
|
Centre for Economic Policy Research (United Kingdom)
4
|
National Bureau of Economic Research (United States)
2
|
|
Fondazione Eni Enrico Mattei (Italy)
1
|
