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Jacques Durieu (), Hans Haller (), Nicolas Querou and Philippe Solal
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Jacques Durieu: CREUSET, University of Saint-Etienne, 42023 Saint-Etienne, France
Hans Haller: Department of Economics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0316, USA

International Game Theory Review (IGTR), 2008, vol. 10, issue 02, 177-194

Abstract: We study strategic games where players' preferences are weak orders which need not admit utility representations. First of all, we extend Voorneveld's concept of best-response potential from cardinal to ordinal games and derive the analogue of his characterization result: An ordinal game is a best-response potential game if and only if it does not have a best-response cycle. Further, Milgrom and Shannon's concept of quasi-supermodularity is extended from cardinal games to ordinal games. We find that under certain topological assumptions, the ordinal Nash equilibria of a quasi-supermodular game form a nonempty complete lattice. Finally, we extend several set-valued solution concepts from cardinal to ordinal games in our sense.

Keywords: Ordinal games; potential games; quasi-supermodularity; rationalizable sets; sets closed under behavior relations; C72 (search for similar items in EconPapers)
JEL-codes: B4 C0 C6 C7 D5 D7 M2 (search for similar items in EconPapers)
Date: 2008
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Working Paper: Ordinal Games (2007) Downloads
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DOI: 10.1142/S0219198908001868

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