Why Academics Are Leaving Twitter for Bluesky

• URL: http://arxiv.org/abs/2505.24801v1
• Date: Fri, 30 May 2025 17:03:21 GMT
• Title: Why Academics Are Leaving Twitter for Bluesky
• Authors: Dorian Quelle, Frederic Denker, Prashant Garg, Alexandre Bovet,
• Abstract summary: We show that 18% of scholars in our sample transitioned, with transition rates varying sharply by discipline, political expression, and Twitter engagement but not by traditional academic metrics.<n>We uncover a striking asymmetry whereby information sources drive migration far more powerfully than audience, with this influence decaying exponentially within a week.<n>Our findings provide new insights onto theories of network externalities, directional influence, and platform migration, highlighting information sources' central role in overcoming switching costs.
• Score: 42.41481706562645
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We analyse the migration of 300,000 academic users from Twitter/X to Bluesky between 2023 and early 2025, combining rich bibliometric data, longitudinal social-media activity, and a novel cross-platform identity-matching pipeline. We show that 18% of scholars in our sample transitioned, with transition rates varying sharply by discipline, political expression, and Twitter engagement but not by traditional academic metrics. Using time-varying Cox models and a matched-pairs design, we isolate genuine peer influence from homophily. We uncover a striking asymmetry whereby information sources drive migration far more powerfully than audience, with this influence decaying exponentially within a week. We further develop an ego-level contagion classifier, revealing that simple contagion drives two-thirds of all exits, shock-driven bursts account for 16%, and complex contagion plays a marginal role. Finally, we show that scholars who rebuild a higher fraction of their former Twitter networks on Bluesky remain significantly more active and engaged. Our findings provide new insights onto theories of network externalities, directional influence, and platform migration, highlighting information sources' central role in overcoming switching costs.

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