|
Resources for the Future (United States)
57
|
National Bureau of Economic Research (United States)
16
|
Brookings Institution (United States)
4
|
|
Fondazione Eni Enrico Mattei (Italy)
4
|
Centre for Energy Policy and Economics (Switzerland)
1
|
Centro Euro-Mediterraneo sui Cambiamenti Climatici (Italy)
1
|
