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However, existing generic topic models that assume documents are independent are inappropriate for analyzing OKCs where structural relationships exist between questions and answers. Thus, a new method is needed to fill this research gap. In this study, we propose a new topic model specifically designed for the text in OKCs. We make three primary contributions to the research on topic modeling in this context. First, we build a general and flexible Bayesian framework to explicitly model structural and temporal dependencies among texts. Second, we statistically demonstrate the approximate model inference using mean-field and coordinate ascent algorithms. Third, we showcase the practical value and relative merit of our method via a specific downstream task (i.e., user profiling). The proposed model is illustrated using two real-world datasets from well-known OKCs (i.e., Stack Exchange and Quora), and extensive experiments demonstrate its superiority over several cutting-edge benchmarks.<\/jats:p>","DOI":"10.25300\/misq\/2023\/17885","type":"journal-article","created":{"date-parts":[[2024,6,10]],"date-time":"2024-06-10T15:59:34Z","timestamp":1718035174000},"page":"931-978","source":"Crossref","is-referenced-by-count":4,"title":["TM-OKC: An Unsupervised Topic Model for Text in Online Knowledge Communities"],"prefix":"10.25300","volume":"48","author":[{"given":"Dongcheng","family":"Zhang","sequence":"first","affiliation":[{"name":"CUHK Business School, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China"}]},{"given":"Kunpeng","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Decision, Operations and Information Technologies, Robert H. 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