The Leiden Rankings

The Centre for Science and Technology Studies at the University of Leiden has developed a ranking system based on bibliometrics, that is the quantity of academic publication. The Centre has presented results for the largest 100 European (including Israel) universities.

The rankings use a multiple- indicator approach, using several methods of presenting the same data. The Centre explains:

The latter point is very important: on the basis of the same data and the same technical and methodological starting points, different types of impact-indicators can be constructed, for instance one focusing entirely on impact, and another in which also scale (size of the institution) is taken in to account. Rankings based on these different indicators are not the same, although they originate from exactly the same data. Moreover, rankings are strongly influenced by the size-threshold used to define the set of universities for which the ranking is calculated. This is very clearly illustrated by comparison of the top-100 versus the top-50 European universities.

The Centre provides four different Rankings. The top ten in the yellow list, number of publications, is as follows.

1. Cambridge
2. University College London
3. Oxford
4. Imperial College London
5. Munich
6. Pierre and Marie Curie (Paris 6)
7. Milan
8. Utrecht
9. Catholic University Leuven (Flemish)
10. Manchester

The green ranking is by "size-independent, field-normalized average impact "

1. Oxford

2. Cambridge

3. ETH Zurich

4. Lausanne

5. Geneva

6. Edinburgh

7. University College London

8. Erasmus Rotterdam

9. Imperial College London

10. Basel


The blue ranking is by citations per publication

1. Lausanne
2. Geneva
3. Oxford
4. Basel
5. Karolinska Institute Sweden
6. Erasmus Rotterdam
7. University College London
8. Cambridge
9. Edinburgh
10. Zurich


The orange ranking is by "size-independent, field-normalized average impact "

1. Cambridge

2. Oxford

3. University College London

4. Imperial college London

5. Utrecht

6. Helsinki

7. ETH Zurich

8. Catholic University of Leuven (Flemish)

9. Munich

10. Karolinska

See the Centre's web site for an explanation of the technical terminology.

What is interesting about these rankings is that continental European universities are closing in on Oxford, Cambridge and the London colleges and when it comes to the citation of academic publications are beginning to move ahead.

As a measure of current research performance these rankings are superior to Shanghai Jiao Tong which counts long-dead Nobel prize winners.