Identifying Topic-based Communities by Combining Social Network Data and User Generated Content

Mirai Igarashi and Nobuhiko Terui

No 97, DSSR Discussion Papers from Graduate School of Economics and Management, Tohoku University

Abstract: This study proposes a model for identifying communities by combining two types of data: social network data and user-generated-content (UGC). The existing models for detecting the community structure of a network employ only network information. However, not all people connected in a network share the same interests. For instance, even if students belong to the same community of "school," they may have various hobbies such as music, books, or sports. Hence, targeting various networks to identify communities according to their interests uncovered by their communications on social media is more realistic and beneficial for companies. In addition, people may belong to multiple communities such as family, work, and online friends. Our model explores multiple overlapping communities according to their topics identified using two types of data jointly. By way of validating the main features of the proposed model, our simulation study shows that the model correctly identifies the community structure that could not be found without considering both network data and UGC. Furthermore, an empirical analysis using Twitter data clarifies that our model can find realistic and meaningful community structures from large social networks and has a good predictive performance.

Pages: 44 pages
Date: 2019-04
New Economics Papers: this item is included in nep-pay, nep-soc and nep-ure
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http://hdl.handle.net/10097/00125359

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Persistent link: https://EconPapers.repec.org/RePEc:toh:dssraa:97

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