Invasion of cooperation in scale-free networks: Accumulated vs. average payoffs

Genki Ichinose*, Hiroki Sayama

*この研究の対応する著者

研究成果: Conference contribution

抄録

It is well known that cooperation cannot be an evolutionary stable strategy for a non-iterative game in a well-mixed population. In contrast, structured populations favor cooperation since cooperators can benefit each other by forming local clusters. Especially, previous studies have shown that scale-free networks strongly promote cooperation. However, little is known about the invasion mechanism of cooperation in scale-free networks. Here we conducted evolutionary simulations of the evolution of cooperation in scale-free networks where, starting from all defectors, cooperators can spontaneously emerge by mutation. The purpose of this study is to reveal microscopic and macroscopic behaviors of the cooperators' invasion into the network. Since the evolutionary dynamics are influenced by the definition of fitness, we tested two commonly adopted fitness functions: accumulated payoff and average payoff. The simulation results show that cooperation is strongly enhanced in the case of the accumulated payoff when the temptation for defection is low. However, as the temptation becomes higher, cooperation persists more in the case of the average payoff. Moreover, in the case of the average payoff, lower degree nodes play a more important role in spreading cooperative strategies compared to the case of the accumulated payoff.

本文言語English
ホスト出版物のタイトルArtificial Life 14 - Proceedings of the 14th International Conference on the Synthesis and Simulation of Living Systems, ALIFE 2014
編集者Hiroki Sayama, John Rieffel, Sebastian Risi, Rene Doursat, Hod Lipson
出版社MIT Press Journals
ページ398-399
ページ数2
ISBN(電子版)9780262326216
出版ステータスPublished - 2014
外部発表はい
イベント14th International Conference on the Synthesis and Simulation of Living Systems, ALIFE 2014 - Manhattan, United States
継続期間: 2014 7 302014 8 2

出版物シリーズ

名前Artificial Life 14 - Proceedings of the 14th International Conference on the Synthesis and Simulation of Living Systems, ALIFE 2014

Conference

Conference14th International Conference on the Synthesis and Simulation of Living Systems, ALIFE 2014
国/地域United States
CityManhattan
Period14/7/3014/8/2

ASJC Scopus subject areas

  • 生化学、遺伝学、分子生物学(全般)
  • 人工知能
  • モデリングとシミュレーション

フィンガープリント

「Invasion of cooperation in scale-free networks: Accumulated vs. average payoffs」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル