|
Mathematica Policy Research (United States)
17
|
RAND Corporation (United States)
16
|
Centre for Economic Policy Research (United Kingdom)
15
|
|
Fondazione Eni Enrico Mattei (Italy)
15
|
Centre for European Policy Studies (Belgium)
11
|
National Bureau of Economic Research (United States)
9
|
|
American Enterprise Institute (United States)
4
|
Centre for International Governance Innovation (Canada)
3
|
Center for American Progress (United States)
1
|
|
Centre for Energy Policy and Economics (Switzerland)
1
|
Konrad Adenauer Foundation (Germany)
1
|
Overseas Development Institute (United Kingdom)
1
|
|
Science Policy Research Unit (United Kingdom)
1
|
