Two Time Scales of Online Discussion: Mixture Distributions of Thread Durations Across Four Reddit Communities

Collection of recent CS/Social Information preprints covering online discussion dynamics, misinformation contagion, platform governance, detection of influence operations, critique of an oft-used fact-checking dataset, heterogeneous-graph anomaly detection, and social dynamics in LLM-agent simulations. Key findings: Reddit thread durations are best modeled as a mixture of two regimes (brief reactions vs extended discussions) across communities; conspiracy ‘rabbit holes’ can emerge from interacting contagions on Twitter (7.6M tweets) with a persistent ‘settler effect’; behavioral (policy-based)