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2017
- handle: 10670/1.b1356h
- halshs: halshs-01432953
Mots-clés
social networks partnerships matchings in networks non-stationary networks laboratory experiments D - Microeconomics/D.D8 - Information, Knowledge, and Uncertainty/D.D8.D85 - Network Formation and Analysis: Theory C - Mathematical and Quantitative Methods/C.C7 - Game Theory and Bargaining Theory/C.C7.C78 - Bargaining Theory • Matching Theory C - Mathematical and Quantitative Methods/C.C9 - Design of Experiments/C.C9.C91 - Laboratory, Individual BehaviorSujets proches
Companies Partnership--Law and legislation Agency (Philosophy) Agents Person (Philosophy)Citer ce document
Francis Bloch et al., « The formation of partnerships in social networks », HAL-SHS : économie et finance, ID : 10670/1.b1356h
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Résumé
This paper analyzes the formation of partnerships in social networks. Agents randomly request favors and turn to their neighbors to form a partnership. If favors are costly, agents have an incentive to delay the formation of the partnership. In that case, for any initial social network, the unique Markov Perfect equilibrium results in the formation of the maximum number of partnerships when players become infinitely patient. If favors provide benefits, agents rush to form partnerships at the cost of disconnecting other agents and the only perfect initial networks for which the maximum number of partnerships are formed are the complete and complete bipartite networks. The theoretical model is tested in the lab. Subjects generally play according to their equilibrium strategy and the efficient outcome is obtained over 78% of the times. Decisions are affected by the complexity of the network. Two behavioral rules are observed during the experiment: subjects accept the formation of the partnership too often and reject partnership offers when one of their neighbors is only connected to them.