|
RAND Corporation (United States)
6
|
Resources for the Future (United States)
6
|
Overseas Development Institute (United Kingdom)
3
|
|
Brookings Institution (United States)
2
|
Centre for Economic Policy Research (United Kingdom)
2
|
Ashoka Trust for Research in Ecology and the Environment (India)
1
|
|
Center for Education Policy Analysis (United States)
1
|
Civic Exchange (China)
1
|
International Institute for Environment and Development (United Kingdom)
1
|
|
Mathematica Policy Research (United States)
1
|
Urban Institute (United States)
1
|
