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By explicitly distinguishing the probabilities of messages with varying discourse roles in containing topical words, our model is able to discover clusters of discourse words that are indicative of topical content. In an automatic evaluation on large-scale microblog corpora, our joint model yields topics with better coherence scores than competitive topic models from previous studies. Qualitative analysis on model outputs indicates that our model induces meaningful representations for both discourse and topics. We further present an empirical study on microblog summarization based on the outputs of our joint model. The results show that the jointly modeled discourse and topic representations can effectively indicate summary-worthy content in microblog conversations.<\/jats:p>","DOI":"10.1162\/coli_a_00335","type":"journal-article","created":{"date-parts":[[2018,9,18]],"date-time":"2018-09-18T15:51:51Z","timestamp":1537285911000},"page":"719-754","source":"Crossref","is-referenced-by-count":10,"title":["A Joint Model of Conversational Discourse and Latent Topics on Microblogs"],"prefix":"10.1162","volume":"44","author":[{"given":"Jing","family":"Li","sequence":"first","affiliation":[{"name":"Tencent AI Lab, Shenzhen, China."}]},{"given":"Yan","family":"Song","sequence":"additional","affiliation":[{"name":"Tencent AI Lab, Shenzhen, China."}]},{"given":"Zhongyu","family":"Wei","sequence":"additional","affiliation":[{"name":"Fudan University, School of Data Science, Shanghai, China."}]},{"given":"Kam-Fai","family":"Wong","sequence":"additional","affiliation":[{"name":"The Chinese University of Hong Kong, Department of Systems Engineering and Engineering Management, HKSAR, China."}]}],"member":"281","reference":[{"key":"bib1","first-page":"519","volume-title":"Proceedings of the Tenth International Conference on Web and Social Media","author":"Alvarez-Melis David","year":"2016"},{"key":"bib2","doi-asserted-by":"publisher","DOI":"10.1163\/ej.9789004174726.i-284"},{"key":"bib3","doi-asserted-by":"publisher","DOI":"10.3115\/1706543.1706560"},{"key":"bib4","doi-asserted-by":"publisher","DOI":"10.3115\/1220175.1220201"},{"key":"bib5","doi-asserted-by":"publisher","DOI":"10.3115\/v1\/D14-1226"},{"key":"bib6","first-page":"17","volume-title":"Advances in the 17th Annual Conference on Neural Information Processing Systems","author":"Blei David M.","year":"2003"},{"key":"bib7","doi-asserted-by":"publisher","DOI":"10.1162\/jmlr.2003.3.4-5.993"},{"key":"bib8","doi-asserted-by":"publisher","DOI":"10.1017\/S1351324914000199"},{"key":"bib9","doi-asserted-by":"publisher","DOI":"10.3115\/v1\/P15-1071"},{"key":"bib10","doi-asserted-by":"publisher","DOI":"10.1561\/1500000030"},{"key":"bib11","doi-asserted-by":"publisher","DOI":"10.3115\/1118078.1118083"},{"key":"bib12","first-page":"815","volume-title":"Proceedings of the 48th Annual Meeting of the Association for Computational Linguistics","author":"\u00c7elikyilmaz Asli","year":"2010"},{"key":"bib13","first-page":"66","volume-title":"Proceedings of the Fifth International Conference on Weblogs and Social Media","author":"Chakrabarti Deepayan","year":"2011"},{"key":"bib14","first-page":"288","volume-title":"Advances in the 23rd Annual Conference on Neural Information Processing Systems","author":"Chang Jonathan","year":"2009"},{"key":"bib15","doi-asserted-by":"publisher","DOI":"10.1145\/2433396.2433464"},{"key":"bib16","first-page":"241","volume-title":"Advances in the 20th Annual Conference on Neural Information Processing Systems","author":"Chemudugunta Chaitanya","year":"2006"},{"key":"bib17","doi-asserted-by":"publisher","DOI":"10.1109\/TKDE.2014.2313872"},{"key":"bib18","first-page":"309","volume-title":"Proceedings of the 2004 Conference on Empirical Methods in Natural Language Processing","author":"Cohen William W.","year":"2004"},{"key":"bib19","doi-asserted-by":"publisher","DOI":"10.3115\/1708376.1708427"},{"key":"bib20","first-page":"192","volume":"4","author":"Das Dipanjan","year":"2007","journal-title":"Literature Survey for the Language and Statistics II Course at CMU"},{"key":"bib21","doi-asserted-by":"publisher","DOI":"10.3115\/v1\/P15-1077"},{"key":"bib22","doi-asserted-by":"publisher","DOI":"10.3115\/1220175.1220214"},{"key":"bib23","volume-title":"Textlinguistics","author":"De Beaugrande Robert","year":"1981"},{"key":"bib24","doi-asserted-by":"crossref","unstructured":"Dhillon, Rajdip, Sonali Bhagat, Hannah Carvey, and Elizabeth Shriberg. 2004. 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