CWTS Leiden University Ranking 2019

  • Author: ChemistryViews.org
  • Published: 16 May 2019
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Centre for Science and Technology Studies, Leiden University, The Netherlands
thumbnail image: CWTS Leiden University Ranking 2019

The annual CWTS Leiden University Ranking for 2019 has been published by the Centre for Science and Technology Studies, Leiden University, The Netherlands. The Leiden Ranking is based on bibliographic data from the Web of Science database by Clarivate Analytics. It provides both a size-dependent rating, which is based on the absolute number of top-cited publications, and a size-independent list, where the performance of a university is measured relative to its publication output. The 2019 ranking includes 963 universities.


This year, the top 20 is made up mostly of US and UK institutions, in addition to one Canadian and one Chinese university. The three highest-ranked universities overall (based on top 1 % most cited papers) are Harvard University, Stanford University, and the Massachusetts Institute of Technology (MIT), all USA. This top three has remained the same as last year. The top institution in a non-English-speaking country is Tsinghua University, China, at rank 17, up from rank 22 last year. The highest ranked European institution is the Swiss Federal Institute of Technology (ETH) Zurich at rank 25.


Considering size-independent values, MIT is ranked at number 1, up from last year's second place, followed by Stanford and Harvard. The highest-ranked European institution in this category is the Swiss Federal Institute of Technology (EPFL) Lausanne at rank 14, the top Asian institution is the Nanjing University of Information Science and Technology, China, at rank 27, up from rank 43 last year.


In the physical sciences, which include chemistry and related disciplines, the top rank in the size-dependent rating is occupied by MIT. In the size-independent ranking, Harvard is ranked at number one in these fields.



Size-Dependent Ranking (All Sciences)

(by the number of the university's publications belonging to the top 1 % most frequently cited)

 

Size-Dependent Ranking (All Sciences)

 



Size-Independent Ranking (All Sciences)

(by proportion of the university's publications belonging to the top 1 % most frequently cited)

 

Size-Independent Ranking (All Sciences)

 



Size-Dependent Ranking (Physical Sciences and Engineering)

(by the number of the university's publications belonging to the top 1 % most frequently cited)

 

Size-Dependent Ranking (Physical Sciences and Engineering)

 



Size-Independent Ranking (Physical Sciences and Engineering)

(by proportion of the university's publications belonging to the top 1 % most frequently cited)

 

Size-Independent Ranking (Physical Sciences and Engineering)

 


Methodology

The Leiden Ranking is based on bibliographic data covering the years 2014–2017 from the Web of Science database produced by Clarivate Analytics. Book publications, publications in conference proceedings, publications in journals not indexed in Web of Science, and publications in other languages than English are not included.


The ranking offers the following indicators of the scientific impact of a university:

  • P
    The total number of publications of a university
  • P(top 1 %) and PP(top 1 %)
    The number and the proportion of a university’s publications that, compared with other publications in the same field and in the same year, belong to the top 1% most frequently cited
  • P(top 5 %) and PP(top 5 %)
    The number and the proportion of a university’s publications that, compared with other publications in the same field and in the same year, belong to the top 5% most frequently cited
  • P(top 10 %) and PP(top 10 %)
    The number and the proportion of a university’s publications that, compared with other publications in the same field and in the same year, belong to the top 10% most frequently cited
  • P(top 50 %) and PP(top 50 %)
    The number and the proportion of a university’s publications that, compared with other publications in the same field and in the same year, belong to the top 50% most frequently cited
  • TCS and MCS
    The total and the average number of citations of the publications of a university
  • TNCS and MNCS
    The total and the average number of citations of the publications of a university, normalized for field and publication year. An MNCS value of two, for instance, means that the publications of a university have been cited twice above the average of their field and publication year


The ranking also includes indicators for collaboration, open access publishing, and gender diversity. It provides statistics for the following five fields of science:

  • Biomedical and health sciences
  • Life and earth sciences
  • Mathematics and computer science
  • Physical sciences and engineering
  • Social sciences and humanities

 

Also of Interest

  • CWTS Leiden Ranking 2018,
    ChemistryViews.org 2018.
    Assessing the scientific performance of over 900 universities based on bibliometric indicators

 

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