dorsal/arxiv
View SchemaWar of attrition with implicit time cost
| Authors | Anders Eriksson, Kristian Lindgren, Torbjörn Lundh |
|---|---|
| Categories | |
| ArXiv ID | q-bio/0406005 |
| URL | https://arxiv.org/abs/q-bio/0406005 |
| DOI | 10.1016/j.jtbi.2004.05.016 |
| Journal | Journal of Theoretical Biology, 2004, vol 230(3), pp 319-332 |
Abstract
In the game-theoretic model war of attrition, players are subject to an explicit cost proportional to the duration of contests. We construct a model where the time cost is not explicitly given, but instead depends implicitly on the strategies of the whole population. We identify and analyse the underlying mechanisms responsible for the implicit time cost. Each player participates in a series of games, where those prepared to wait longer win with higher certainty but play less frequently. The model is characterised by the ratio of the winner's score to the loser's score, in a single game. The fitness of a player is determined by the accumulated score from the games played during a generation. We derive the stationary distribution of strategies under the replicator dynamics. When the score ratio is high, we find that the stationary distribution is unstable, with respect to both evolutionary and dynamical stability, and the dynamics converge to a limit cycle. When the ratio is low, the dynamics converge to the stationary distribution. For an intermediate interval of the ratio, the distribution is dynamically but not evolutionarily stable. Finally, the implications of our results for previous models based on the war of attrition are discussed.
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"abstract": "In the game-theoretic model war of attrition, players are subject to an\nexplicit cost proportional to the duration of contests. We construct a model\nwhere the time cost is not explicitly given, but instead depends implicitly on\nthe strategies of the whole population. We identify and analyse the underlying\nmechanisms responsible for the implicit time cost. Each player participates in\na series of games, where those prepared to wait longer win with higher\ncertainty but play less frequently. The model is characterised by the ratio of\nthe winner\u0027s score to the loser\u0027s score, in a single game. The fitness of a\nplayer is determined by the accumulated score from the games played during a\ngeneration. We derive the stationary distribution of strategies under the\nreplicator dynamics. When the score ratio is high, we find that the stationary\ndistribution is unstable, with respect to both evolutionary and dynamical\nstability, and the dynamics converge to a limit cycle. When the ratio is low,\nthe dynamics converge to the stationary distribution. For an intermediate\ninterval of the ratio, the distribution is dynamically but not evolutionarily\nstable. Finally, the implications of our results for previous models based on\nthe war of attrition are discussed.",
"arxiv_id": "q-bio/0406005",
"authors": [
"Anders Eriksson",
"Kristian Lindgren",
"Torbj\u00f6rn Lundh"
],
"categories": [
"q-bio.PE"
],
"doi": "10.1016/j.jtbi.2004.05.016",
"journal_ref": "Journal of Theoretical Biology, 2004, vol 230(3), pp 319-332",
"title": "War of attrition with implicit time cost",
"url": "https://arxiv.org/abs/q-bio/0406005"
},
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