|
National Bureau of Economic Research (United States)
21
|
American Enterprise Institute (United States)
2
|
Fraser Institute (Canada)
2
|
|
Brookings Institution (United States)
1
|
Center for American Progress (United States)
1
|
Centro Euro-Mediterraneo sui Cambiamenti Climatici (Italy)
1
|
|
Competitive Enterprise Institute (United States)
1
|
Environment for Development Initiative (Sweden)
1
|
Mathematica Policy Research (United States)
1
|
