CWTS provides bibliometric data and analyses based on its own citation index system. Our tailor-made study design makes it possible to analyse at the level of a discipline, research field or organisational unit. We offer a broad range of analytical dimensions because we have a plethora of (interconnected) data sources in our citation index system.

CWTS Citation Index system

The core of this system comprises an enhanced version of Clarivate Analytics’ citation indexes: Web-of-Science version of the Science Citation Index, Conference Proceedings Citation Index, Social Science Citation Index and Arts & Humanities Citation Index. A combination of smart computer algorithms and manual data cleaning ensures a better unification of the names and addresses of universities and other publishing organisations as well as the funding organisations mentioned in acknowledgements. Moreover, CWTS ensures better citation counts by taking great care in proper linking of the citing and cited publications.

CWTS is working continuously on expanding its data system with other major scientific databases:

  • PATSTAT (patent analysis)
  • Unpaywall (Open Access)
  • Orbis (Company affiliation information)
  • Altmetrics (social media, blogs, newsfeeds etc.) by Digital Science
  • Dimensions by Digital Science
  • Scopus by Elsevier
  • PubMed
  • Microsoft Academic Graph

State-of-the-art bibliometric performance- and benchmark analysis

CWTS serves its clients with bibliometric data and quantitative analyses of research performance. The performance can be analysed along a vast range of analytical dimensions because we work with all major scientific databases. We assess, for example, the following dimensions: publication output, citation impact, collaboration, open access publishing, gender, workforce composition, societal impact and multidisciplinarity. Moreover, we are able to provide an international comparative perspective in which several institutes or countries can be included.

CWTS has provided a comprehensive bibliometric performance analysis to the University of Helsinki and its Faculties. Please see the full report here.

Leiden Ranking

The CWTS Leiden Ranking 2020 is a highly valued source of bibliometric indicators. The ranking offers important insights into the scientific performance for over 1100 universities worldwide. The performance is presented along four analytical dimensions: scientific impact, collaboration, open access and gender. All data and indicators used reflect the state of the art in bibliometrics.

Select your preferred indicators, generate results, and explore the performance of universities on the Leiden Ranking website.

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Journal profiles

Journal profiles provide bibliometric information and journal indicators on scientific journals. They furnish our clients with excellent insight into a journal’s positioning and standing within the scientific world. This enables our clients to assess which journals align with their mission. Our indicators go far beyond the regular journal impact factor by taking field-specific citation characteristics into account.