{"slug": "exit-and-join-dynamics-for-decentralized-coalition-formation", "title": "Exit-and-Join Dynamics for Decentralized Coalition Formation", "summary": "Researchers introduced a decentralized coalition formation model driven by unilateral exit-and-join decisions, using the Aumann-Dreze value for local payoff calculations. The model links cooperative payoff allocation with noncooperative best-response behavior, establishing equilibrium characterizations and analyzing the impact of switching and acceptance costs on stability.", "body_md": "arXiv:2606.19683v1 Announce Type: new\nAbstract: This paper studies coalition formation as a decentralized dynamical process driven by unilateral exit-and-join decisions. Agents evaluate local moves using the Aumann-Dreze value, so payoffs are computed within the agent's current coalition rather than through a globally negotiated coalition structure. The resulting model links cooperative payoff allocation with noncooperative best-response behavior: a terminal partition is precisely a coalition structure with no admissible, individually profitable exit-and-join deviation. We establish equilibrium characterizations, identify conditions under which the dynamics admit scalar Lyapunov or exact-potential representations, and analyze how switching and acceptance costs shape local stability. Numerical experiments test finite-time stabilization, cost sensitivity, and a special convex-game benchmark.", "url": "https://wpnews.pro/news/exit-and-join-dynamics-for-decentralized-coalition-formation", "canonical_source": "https://arxiv.org/abs/2606.19683", "published_at": "2026-06-19 04:00:00+00:00", "updated_at": "2026-06-19 04:03:58.167796+00:00", "lang": "en", "topics": ["machine-learning", "ai-research"], "entities": ["Aumann-Dreze value"], "alternates": {"html": "https://wpnews.pro/news/exit-and-join-dynamics-for-decentralized-coalition-formation", "markdown": "https://wpnews.pro/news/exit-and-join-dynamics-for-decentralized-coalition-formation.md", "text": "https://wpnews.pro/news/exit-and-join-dynamics-for-decentralized-coalition-formation.txt", "jsonld": "https://wpnews.pro/news/exit-and-join-dynamics-for-decentralized-coalition-formation.jsonld"}}