|
Brookings Institution (United States)
18
|
RAND Corporation (United States)
11
|
Atlantic Council (United States)
5
|
|
Center for American Progress (United States)
2
|
Mathematica Policy Research (United States)
2
|
American Enterprise Institute (United States)
1
|
|
Centre for Economic Policy Research (United Kingdom)
1
|
Centre for International Governance Innovation (Canada)
1
|
Fondazione Eni Enrico Mattei (Italy)
1
|
|
Science Policy Research Unit (United Kingdom)
1
|
