Title
The Leiden ranking 2011/2012: Data collection, indicators, and interpretation
Abstract
The Leiden Ranking 2011/2012 is a ranking of universities based on bibliometric indicators of publication output, citation impact, and scientific collaboration. The ranking includes 500 major universities from 41 different countries. This paper provides an extensive discussion of the Leiden Ranking 2011/2012. The ranking is compared with other global university rankings, in particular the Academic Ranking of World Universities (commonly known as the Shanghai Ranking) and the Times Higher Education World University Rankings. The comparison focuses on the methodological choices underlying the different rankings. Also, a detailed description is offered of the data collection methodology of the Leiden Ranking 2011/2012 and of the indicators used in the ranking. Various innovations in the Leiden Ranking 2011/2012 are presented. These innovations include (1) an indicator based on counting a university's highly cited publications, (2) indicators based on fractional rather than full counting of collaborative publications, (3) the possibility of excluding non-English language publications, and (4) the use of stability intervals. Finally, some comments are made on the interpretation of the ranking and a number of limitations of the ranking are pointed out. © 2012 Wiley Periodicals, Inc.
Year
DOI
Venue
2012
10.1002/asi.22708
Journal of the Association for Information Science and Technology
Keywords
DocType
Volume
data collection,world universities,academic ranking,full counting,shanghai ranking,times higher education world,major university,leiden ranking,different country,global university ranking,different ranking,bibliometrics,citation analysis
Journal
63
Issue
ISSN
Citations 
12
1532-2882
137
PageRank 
References 
Authors
6.15
19
10
Search Limit
100137
Name
Order
Citations
PageRank
Ludo Waltman12236105.47
Clara Calero-Medina221312.40
Joost Kosten31466.70
E. Noyons435120.38
Robert J.W. Tijssen51376.15
Nees Jan Van Eck6163775.45
Thed N. Van Leeuwen7115878.52
Anthony F. J. Van Raan81673144.69
Martijn S. Visser984150.57
Paul Wouters1054934.68