| US |
Washington |
International Food Policy Research Institute |
International Food Policy Research Institute |
| US |
Washington |
Peterson Institute for International Economics |
Peterson Institute for International Economics |
| US |
Washington |
Pew Research Center |
Pew Research Center |
| US |
Washington |
Tax Foundation |
Tax Foundation |
| US |
Washington |
The American Enterprise Institute for Public Policy Research |
The American Enterprise Institute for Public Policy Research |
| US |
Washington |
International Monetary Fund, Research Department |
International Monetary Fund, Research Department |
| US |
Washington |
World Bank : Network of research units |
World Bank : Network of research units |
| PL |
Warsaw |
Institute of Environmental Protection - National Research Institute |
Instytut Ochrony Środowiska - Państwowy Instytut Badawczy |
| PL |
Warsaw |
CASE - Center for Social and Economic Research |
CASE - Center for Social and Economic Research |
| PL |
Warsaw |
Educational Research Institute, Warsaw |
Instytut Badań Edukacyjnych w Warszawie |