According to The Times Higher Education Supplement, 2008:
| Rank | University |
| 1 | Harvard University, USA |
| 2 | Yale University, USA |
| 3 | University of Cambridge, UK |
| 4 | University of Oxford, UK |
| 5 | California Institute of Technology, USA |
| 6 | Imperial College London, UK |
| 7 | University College London, UK |
| 8 | The University of Chicago, USA |
| 9 | Massachusetts Institute of Technology, USA |
| 10 | Columbia University, USA |