|
Fraser Institute (Canada)
43
|
National Bureau of Economic Research (United States)
5
|
American Enterprise Institute (United States)
4
|
|
Brookings Institution (United States)
1
|
Center for Energy and Environmental Policy Research (United States)
1
|
Energy Policy Research Group (United Kingdom)
1
|
|
International Institute for Environment and Development (United Kingdom)
1
|
Overseas Development Institute (United Kingdom)
1
|
Science Policy Research Unit (United Kingdom)
1
|
