{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,26]],"date-time":"2026-07-26T07:42:06Z","timestamp":1785051726700,"version":"3.55.0"},"reference-count":73,"publisher":"Oxford University Press (OUP)","issue":"11","license":[{"start":{"date-parts":[[2023,11,10]],"date-time":"2023-11-10T00:00:00Z","timestamp":1699574400000},"content-version":"vor","delay-in-days":9,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100002739","name":"Aarhus University Research Foundation","doi-asserted-by":"publisher","award":["CF18-1108"],"award-info":[{"award-number":["CF18-1108"]}],"id":[{"id":"10.13039\/501100002739","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002808","name":"Carlsberg Foundation","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100002808","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,11,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Hostile interactions permeate political debates on social media, but what is driving the long-term developments in online political hostility? Prior research focuses on individual-level factors such as the dispositions of users or network-level factors such as echo chambers. Moving beyond these accounts, we develop and test an event-oriented explanation and demonstrate that over the course of the 2020 election year in the United States, all major shifts in political hostility on the social media platform Twitter were driven by external offline events. Importantly, these events were magnified by Twitter users within the most politically hostile and most ideologically homogeneous networks. Further contributing to the individual and network-oriented accounts, we show that divisive offline events mobilized individual users not already disposed for hostility and may have helped facilitate the formation of echo chambers. The dynamics of online interactions\u2014including their level of hostility\u2014seem crucially dependent on developments in the offline world.<\/jats:p>","DOI":"10.1093\/pnasnexus\/pgad382","type":"journal-article","created":{"date-parts":[[2023,11,11]],"date-time":"2023-11-11T22:37:32Z","timestamp":1699742252000},"source":"Crossref","is-referenced-by-count":11,"title":["The event-driven nature of online political hostility: How offline political events make online interactions more hostile"],"prefix":"10.1093","volume":"2","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7067-847X","authenticated-orcid":false,"given":"Stig","family":"Hebbelstrup Rye Rasmussen","sequence":"first","affiliation":[{"name":"School of Business and Social Sciences, Aarhus Universitet , Aarhus 8000 , Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6782-5635","authenticated-orcid":false,"given":"Michael 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