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Guided by social network theory, the theory of double jeopardy, and niche theory, this study proposes an integrated framework to explain the evolution of SNS choices of the US audience between 2016 and 2019. Shared traffic data were retrieved from comScore\u2019s Media Metrix Multi-Platform database. The empirical results of the separable temporal exponential random graph model (STERGM) confirm that preferential attachment, audience size, and niche width significantly drive the likelihood of tie formation and dissolution in the evolving audience duplication network. These effects hold true even when other endogenous structural features and exogenous nodal attributes are taken into account. Theoretical implications for the networked media landscape are discussed. <\/jats:p>","DOI":"10.1177\/1461444821993048","type":"journal-article","created":{"date-parts":[[2021,2,15]],"date-time":"2021-02-15T11:52:39Z","timestamp":1613389959000},"page":"2068-2087","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":12,"title":["Evolution of audience duplication networks among social networking sites: Exploring the influences of preferential attachment, audience size, and niche width"],"prefix":"10.1177","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2942-3739","authenticated-orcid":false,"given":"Yu","family":"Xu","sequence":"first","affiliation":[{"name":"Northwestern University, USA"}]}],"member":"179","published-online":{"date-parts":[[2021,2,15]]},"reference":[{"key":"bibr1-1461444821993048","volume-title":"The Long Tail: How Endless Choice Is Creating Unlimited Demand","author":"Anderson C","year":"2006"},{"key":"bibr2-1461444821993048","doi-asserted-by":"publisher","DOI":"10.1126\/science.286.5439.509"},{"key":"bibr3-1461444821993048","doi-asserted-by":"publisher","DOI":"10.17477\/jcea.2011.10.1.043"},{"key":"bibr4-1461444821993048","doi-asserted-by":"publisher","DOI":"10.1177\/0894439310382519"},{"key":"bibr5-1461444821993048","doi-asserted-by":"publisher","DOI":"10.1007\/s13278-015-0297-6"},{"key":"bibr6-1461444821993048","doi-asserted-by":"publisher","DOI":"10.1080\/1097198X.2016.1217135"},{"key":"bibr7-1461444821993048","doi-asserted-by":"publisher","DOI":"10.1111\/j.1083-6101.2007.00393.x"},{"key":"bibr8-1461444821993048","doi-asserted-by":"publisher","DOI":"10.2307\/2576011"},{"key":"bibr9-1461444821993048","doi-asserted-by":"publisher","DOI":"10.1016\/S0191-3085(02)24002-2"},{"key":"bibr10-1461444821993048","unstructured":"comScore (2020) US Media Metrix and Mobile Metrix sample statistics. 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