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Alliance formation in a multipolar world

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  • Devine, Peter
  • Joshi, Sumit
  • Mahmud, Ahmed Saber

Abstract

We propose a multilayer network approach to alliance formation. In a signed affinity layer, agents are partitioned into clusters, with friendly relations within and hostile connections across clusters. Agents then form defensive collaborations in an alliance layer as follows: Agents in the same cluster form a nested split graph with degree inversely correlated to the level of hostility, and agents from disparate clusters with high-degree and low-hostility form cliques. Within cliques, agents from a cluster that is “intermediate” in terms of discord serve as a bridge to interconnect agents from more “extreme” clusters.

Suggested Citation

  • Devine, Peter & Joshi, Sumit & Mahmud, Ahmed Saber, 2024. "Alliance formation in a multipolar world," Journal of Economic Behavior & Organization, Elsevier, vol. 223(C), pages 248-277.
    • Handle: RePEc:eee:jeborg:v:223:y:2024:i:c:p:248-277
    DOI: 10.1016/j.jebo.2024.05.008
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    References listed on IDEAS

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    More about this item

    Keywords

    Alliance formation; Signed graphs; Nested split graphs; Pairwise stability; Cliques;
    All these keywords.

    JEL classification:

    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
    • D74 - Microeconomics - - Analysis of Collective Decision-Making - - - Conflict; Conflict Resolution; Alliances; Revolutions
    • D85 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Network Formation

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