| 2005 rank | 2004 rank | Institution | Country | Citations per paper |
| 1 | 3 | National Bureau of Economic Research | US | 11.6 |
| 2 | 4 | Veterans Administration Medical Center | US | 10 |
| 3 | 7 | Rand Corporation | US | 8.4 |
| 4 | 10 | Federal Reserve System | US | 8.1 |
| 5 | 8 | Centres for Disease Control and Prevention | US | 7.3 |
| 6 | 14 | World Bank | US | 5.7 |
| 7 | 15 | International Monetary Fund | US | 4.9 |
| 8 | 13 | Centre for Economic Policy Research | UK | 4.6 |
| 9 | - | CNRS | France | 1.7 |
| 10 | - | Russian Academy of Sciences | Russia | 0.6 |
