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The N-Player War of Attrition in the Limit of Infinitely Many Players

Journal article
Authors Peter Helgesson
Bernt Wennberg
Published in Dynamic Games and Applications
Volume 5
Issue 1
Pages 65-93
ISSN 2153-0785
Publication year 2015
Published at Department of Mathematical Sciences
Department of Mathematical Sciences, Mathematics
Pages 65-93
Language en
Links dx.doi.org/10.1007/s13235-014-0110-...
Keywords Game theory, War of attrition, Evolutionarily stable strategy, N-Player games
Subject categories Mathematical Analysis, Other Mathematics

Abstract

The War of Attrition is a classical game theoretic model that was first introduced to mathematically describe certain non-violent animal behavior. The original setup considers two participating players in a one-shot game competing for a given prize by waiting. This model has later been extended to several different models allowing more than two players. One of the first of these N -player generalizations was due to Haigh and Cannings (Acta Appl Math 14:59–74, 1989) where two possible models are mainly discussed; one in which the game starts afresh with new strategies each time a player leaves the game, and one where the players have to stick with the strategy they chose initially. The first case is well understood whereas, for the second case, much is still left open. There are two main results in this paper. The first concerns the asymptotic behavior of the models as the number of players tend to infinity. In particular, we prove that the time evolution of the models coincide in the limit, thus providing a link between the two in the regime of infinitely many players. Secondly we prove, under certain conditions, existence and uniqueness of an ESS in the second model for any given number of players.

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Utskriftsdatum: 2019-12-06