|
National Bureau of Economic Research (United States)
24
|
Centre for Economic Policy Research (United Kingdom)
23
|
Atlantic Council (United States)
7
|
|
Center for International Development (United States)
7
|
Environment for Development Initiative (Sweden)
5
|
Center for Energy and Environmental Policy Research (United States)
3
|
|
Brookings Institution (United States)
2
|
World Resources Institute (United States)
1
|
