CWTS Leiden Ranking

Last updated
CWTS Leiden Ranking
EditorMark Neijssel, Nees Jan van Eck, Ludo Waltman
Categories Higher education
FrequencyAnnual
Publisher Leiden University, Netherlands
First issue2006;17 years ago (2006)
Country Netherlands
Language English
Website www.leidenranking.com

The CWTS Leiden Ranking is an annual global university ranking based exclusively on bibliometric indicators. The rankings are compiled by the Centre for Science and Technology Studies (Dutch: Centrum voor Wetenschap en Technologische Studies, CWTS) at Leiden University in the Netherlands. The Clarivate Analytics bibliographic database Web of Science is used as the source of the publication and citation data. [1]

Contents

The Leiden Ranking ranks universities worldwide by number of academic publications according to the volume and citation impact of the publications at those institutions. [1] The rankings take into account differences in language, discipline and institutional size. [2] Multiple ranking lists are released according to various bibliometric normalization and impact indicators, including the number of publications, citations per publication, and field-normalized impact per publication. [3] In addition to citation impact, the Leiden Ranking also ranks universities by scientific collaboration, including collaboration with other institutions and collaboration with an industry partner. [4]

The first edition of the Leiden Ranking was produced in 2007. [5] The 2014 rankings include 750 universities worldwide, which were selected based on the number of articles and reviews published by authors affiliated with those institutions in 2009–2012 in so-called "core" journals, a set of English-language journals with international scope and a "sufficiently large" number of references in the Web of Science database. [1]

According to the Netherlands Centre for Science and Technology Studies, the crown indicator is Indicator 4 (PP top 10%), and is the only one presented in university rankings by the Swiss State Secretariat for Education, Research and Innovation website (UniversityRankings.ch). [6] [7]

Results

Rockefeller University was ranked first in 2014 by citation impact Rockefeller University.JPG
Rockefeller University was ranked first in 2014 by citation impact

As of 2023, Chinese universities dominate the rankings, with 16 out of the top 25 universities ranked being in China., [8] while in previous years, the top was heavily dominated by American universities. In the 2014 rankings, Rockefeller University was first by citation impact, as measured by both mean citation score and mean normalized citation score, as well as by the proportion of papers belonging to the top 10% in their field. Notably, the University of Oxford, the University of Cambridge, and other British universities score much lower than in other university rankings, such as the Times Higher Education World University Rankings and QS World University Rankings, which are based in part on reputational surveys among academics. [3]

When measuring by collaboration with other universities (the proportion of number of publications co-authored with other institutions), the top three spots were occupied by National Yang-Ming University and two other institutions from Taiwan in 2014, followed by universities from France, the United Kingdom and a number of other European countries. King Abdulaziz University and King Saud University in Saudi Arabia led the list in 2014 when measured by international collaboration. [3]

Indicators

The Leiden Ranking ranks universities by the following indicators: [4]

Citation impact

Scientific collaboration

Criticism

In a 2010 article, Loet Leydesdorff criticized the method used by the Leiden Ranking to normalize citation impact by subject field. The mean normalized citation score (MNCS) indicator is based on the ISI subject category classification used in Web of Science, which was "not designed for the scientometric evaluation, but for the purpose of information retrieval". [9] Also, normalizing at a higher aggregation level, rather than at the level of individual publications, gives more weight to older publications, particularly reviews, and to publications in fields where citation levels are traditionally higher. [10]

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References

  1. 1 2 3 ""Data collection", CWTS Leiden Ranking". Universiteit Leiden Centre for Science and Technology Studies. Retrieved 15 June 2014.
  2. ↑ van Raan, Ton; van Leeuwen, Thed; Visser, Martijn (2011-01-06). "Non-English papers decrease rankings". Nature. 469 (34): 34. Bibcode:2011Natur.469...34V. doi: 10.1038/469034a . PMID   21209649.
  3. 1 2 3 "Leiden Ranking". Universiteit Leiden Centre for Science and Technology Studies. Retrieved 15 June 2014.
  4. 1 2 ""Indicators", CWTS Leiden Ranking". Universiteit Leiden Centre for Science and Technology Studies. Retrieved 15 June 2014.
  5. ↑ Waltman, Ludo et al., The Leiden Ranking 2011/2012: Data collection, indicators, and interpretation, Centre for Science and Technology Studies (CWTS), Leiden University, 16 July 2012
  6. ↑ Leydesdorff, L.; Bornmann, L. (2012). "Testing differences statistically with the Leiden ranking". Scientometrics. 3 (92): 781–783. arXiv: 1112.4037 . doi:10.1007/s11192-012-0636-6. PMC   3416977 . PMID   22904580.
  7. ↑ "The Leiden Ranking". State Secretariat for Education, Research and Innovation.
  8. ↑ "CWTS Leiden Ranking - Ranking 2023". CWTS Leiden Ranking.
  9. ↑ Leydesdorff, Loet & Opthof, Tobias, Normalization, CWTS indicators, and the Leiden Rankings: Differences in citation behavior at the level of fields, 2010
  10. ↑ Andrejs Rauhvargers, Global University Rankings And Their Impact Archived 2014-12-22 at the Wayback Machine , European University Association, 2011
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