COLLNET Journal of Scientometrics and Information Management ISSN : 0973 – 7766 (Print) 2168 – 930X (Online) DOI : 10.1080/09737766.2018.1550043 On the necessity of multiple university rankings Lefteris Angelis Nick Bassiliades Yannis Manolopoulos Nowadays university rankings are ubiquitous commodities; a plethora of them is published every year by private enterprises, state authorities and universities. University rankings are very popular to governments, journalists, university administrations and families as well. At the same time, they are heavily criticized as being very subjective and contradic- tory to each other. University rankings have been studied with respect to political, educational and data management aspects. In this paper, we Lefteris Angelis* focus on a specific research question regarding the alignment of some School of Informatics well-known such rankings, ultimately targeting to investigate the use- Aristotle University of fulness of the variety of all these rankings. First, we describe in detail Thessaloniki the methodology to collect and homogenize the data and, second, we Thessaloniki 54124 statistically analyze these data to examine the correlation among the dif- Greece ferent rankings. The results show that despite their statistically signifi-
[email protected] cant correlation, there are many cases of high divergence and instability, which can be reduced by ordered categorization. Our conclusion is that Nick Bassiliades if, in principle, someone accepts the reliability of university rankings, School of Informatics the necessity and the usefulness, of all of them is questionable since Aristotle University of only few of them could be sufficient representatives of the whole set. Thessaloniki The overabundance of university rankings is especially conspicuous for Thessaloniki 54124 the top universities.