| 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 |
| Rank | Institution | Country | Citations per paper |
| 1 | Dana Farber Cancer Institute | US | 20.3 |
| 2 | Fred Hutchinson Cancer Research Institute | US | 17.4 |
| 3 | Brigham and Women's Hospital | US | 16.0 |
| 4 | Memorial Sloan Kettering Cancer Center | US | 15.1 |
| 5 | National Institutes of Health | US | 14.5 |
| 6 | Medical Research Council | UK | 14.4 |
| 7 | Max Planck Society | Germany | 14.3 |
| 8 | Beth Israel Deaconess Medical Center | US | 14.1 |
| 9 | National Cancer Institute | US | 14.0 |
| 10 | Japan Science and Technology Corporation | Japan | 13.7 |
| 11 | Massachusetts General Hospital | US | 13.5 |
| 12 | Riken | Japan | 13.2 |
| 13 | Institut Pasteur | France | 11.3 |
| 14 | Centers for Disease Control and Prevention | US | 11.2 |
| 15 | Veterans Affairs Medical Center | US | 10.3 |
