Stochastic block model reveals maps of citation patterns and their evolution in time
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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2018-08-01
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Language
en
Pages
27
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Journal of Informetrics, Volume 12, issue 3, pp. 757-783
Abstract
In this study we map out the large-scale structure of citation networks of science journals and follow their evolution in time by using stochastic block models (SBMs). The SBM fitting procedures are principled methods that can be used to find hierarchical grouping of journals that show similar incoming and outgoing citations patterns. These methods work directly on the citation network without the need to construct auxiliary networks based on similarity of nodes. We fit the SBMs to the networks of journals we have constructed from the data set of around 630 million citations and find a variety of different types of groups, such as communities, bridges, sources, and sinks. In addition we use a recent generalization of SBMs to determine how much a manually curated classification of journals into subfields of science is related to the group structure of the journal network and how this relationship changes in time. The SBM method tries to find a network of blocks that is the best high-level representation of the network of journals, and we illustrate how these block networks (at various levels of resolution) can be used as maps of science.Description
| openaire: EC/H2020/654024/EU//SoBigData
Keywords
Citation networks, Evolution of science, Stochastic block model, Web of science
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Citation
Hric, D, Kaski, K & Kivelä, M 2018, ' Stochastic block model reveals maps of citation patterns and their evolution in time ', Journal of Informetrics, vol. 12, no. 3, pp. 757-783 . https://doi.org/10.1016/j.joi.2018.05.004