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Detecting anomalous citation groups in journal networks

Kojaku, Sadamori, Livan, Giacomo and Masuda, Naoki (2021) Detecting anomalous citation groups in journal networks. Scientific Reports, 11 (1). ISSN 2045-2322

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Identification Number: 10.1038/s41598-021-93572-3


The ever-increasing competitiveness in the academic publishing market incentivizes journal editors to pursue higher impact factors. This translates into journals becoming more selective, and, ultimately, into higher publication standards. However, the fixation on higher impact factors leads some journals to artificially boost impact factors through the coordinated effort of a “citation cartel” of journals. “Citation cartel” behavior has become increasingly common in recent years, with several instances being reported. Here, we propose an algorithm—named CIDRE—to detect anomalous groups of journals that exchange citations at excessively high rates when compared against a null model that accounts for scientific communities and journal size. CIDRE detects more than half of the journals suspended from Journal Citation Reports due to anomalous citation behavior in the year of suspension or in advance. Furthermore, CIDRE detects many new anomalous groups, where the impact factors of the member journals are lifted substantially higher by the citations from other member journals. We describe a number of such examples in detail and discuss the implications of our findings with regard to the current academic climate.

Item Type: Article
Official URL:
Additional Information: © 2021 The Authors
Divisions: Systemic Risk Centre
Subjects: Z Bibliography. Library Science. Information Resources > ZA Information resources
Date Deposited: 04 Aug 2021 09:21
Last Modified: 15 Sep 2022 11:21

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