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Unbeatable Imitation

Peter Duersch, Jörg Oechssler and Burkhard Schipper ()
Authors registered in the RePEc Author Service: Peter Dürsch

MPRA Paper from University Library of Munich, Germany

Abstract: We show that for many classes of symmetric two-player games, the simple decision rule "imitate-the-best" can hardly be beaten by any other decision rule. We provide necessary and sufficient conditions for imitation to be unbeatable and show that it can only be beaten by much in games that are of the rock-scissors-paper variety. Thus, in many interesting examples, like 2x2 games, Cournot duopoly, price competition, rent seeking, public goods games, common pool resource games, minimum effort coordination games, arms race, search, bargaining, etc., imitation cannot be beaten by much even by a very clever opponent.

Keywords: Imitate-the-best; learning; symmetric games; relative payoffs; zero-sum games; rock-paper-scissors; finite population ESS; potential games; quasisubmodular games; quasisupermodular games; quasiconcave games; aggregative games (search for similar items in EconPapers)
JEL-codes: D43 C73 C72 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-evo and nep-gth
Date: 2010-02-18
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4) Track citations by RSS feed

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Related works:
Journal Article: Unbeatable imitation (2012) Downloads
Working Paper: Unbeatable Imitation (2012) Downloads
Working Paper: Unbeatable Imitation (2011) Downloads
Working Paper: Unbeatable Imitation (2010) Downloads
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