CWTS Leiden Ranking 2014
The CWTS Leiden Ranking 2014 measures the scientific performance of 750 major universities
worldwide. Using a sophisticated set of bibliometric indicators, the ranking aims
to provide highly accurate measurements of the scientific impact of universities
and of universities’ involvement in scientific collaboration.
The CWTS Leiden Ranking 2014 is based on Web of Science indexed publications from the period 2009–2012.
The main outcomes of the ranking are summarized in
this press release.
(A Dutch press release is available here.)
Read about the methodology of the CWTS Leiden Ranking 2014.
Learn more about the products and services offered by CWTS.
The ranking is based on over 25 years of bibliometric experience at Leiden University's CWTS.
The Leiden Ranking is the most exhaustive public source when it comes to bibliometric performance of universities.
The main power of the Leiden ranking is that it is solely based on scholarly impact. Clear. Straightforward.
There are only a few rankings worldwide that are really important. The Leiden Ranking is one of those.
The Leiden Ranking is, contrary to other rankings, not based on arbitrary aggregated indices.
The Leiden ranking is developed by some of the leading experts in the field and gives us a fundament of facts when
trying to estimate the impact of our research.
The Leiden ranking doesn't attempt to weigh different things in a single indicator. That's a big plus.
Differences with other university rankings
Compared with other university rankings, the Leiden Ranking offers more advanced
indicators of scientific impact and collaboration and uses a more transparent methodology.
The Leiden Ranking does not rely on highly subjective data obtained from reputational
surveys or on data provided by universities themselves. Also, the Leiden Ranking
refrains from aggregating different dimensions of university performance into a
single overall indicator.
Improvements and new features
Compared with the previous edition of the CWTS Leiden Ranking, the 2014 edition includes a number of enhancements. First of all,
the number of universities included in the ranking has been increased from 500 to 750. In addition, the normalization methodology
that corrects for field-specific citation practices has been improved, leading to more accurate citation impact indicators. Another
improvement relates to the breakdown of the ranking into a number of broad fields of science. Instead of five fields the ranking
now offers seven, and these fields have been defined at the level of individual publications rather than at the journal level.
The CWTS Leiden Ranking 2015 will be released on May 20, 2015.