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  1. 010 学術雑誌論文
  2. 大槻, 久 / OHTSUKI, Hisashi

How should we define goodness? - reputation dynamics in indirect reciprocity

https://ir.soken.ac.jp/records/3665
https://ir.soken.ac.jp/records/3665
beaec885-2486-4d39-9b19-5f1f87d891ce
Item type 学術雑誌論文 / Journal Article(1)
公開日 2013-06-27
タイトル
タイトル How should we define goodness? - reputation dynamics in indirect reciprocity
タイトル
タイトル How should we define goodness? - reputation dynamics in indirect reciprocity
言語 en
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 OHTSUKI, Hisashi

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OHTSUKI, Hisashi

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IWASA, Yoh

× IWASA, Yoh

IWASA, Yoh

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著者別名 大槻, 久

× 大槻, 久

大槻, 久

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抄録
内容記述タイプ Abstract
内容記述 Theory of indirect reciprocity is important in explaining cooperation between humans. Since a partner of a social interaction often changes, an individual should assess his partner by using social information such as reputation and make decisions whether to help him or not. To those who have `good' social reputation does a player give aid as reciprocation, whereas he has to refuse to help those who have `bad' reputation. Otherwise benefits of altruism is easily exploited by them. Little has been known, however, about the definition of `goodness' in reputation. What kind of actions are and should be regarded as good and what kind of actions bad? And what sort of goodness enables sustaining exchange of altruism? We herein challenge this question with an evolutionary perspective. We generalize social reputation as `Honor-score' (H-score) and examine the conditions under which individuals in a group stably maintain cooperative relationships based on indirect reciprocity. We examine the condition for evolutionarily stable strategies (ESSs) over 4096 possible cases exhaustively. Mathematical analysis reveals that only eight cases called `leading eight' are crucial to the evolution of indirect reciprocity. Each in the leading eight shares two common characteristics: (i) cooperation with good persons is regarded as good while defection against them is regarded as bad, and (ii) defection against bad persons should be regarded as a good behavior because it works as sanction. Our results give one solution to the definition of goodness from an evolutionary viewpoint. In addition, we believe that the formalism of reputation dynamics gives general insights into the way social information is generated, handled, and transmitted in animal societies.
書誌情報 Journal of Theoretical Biology
en : Journal of Theoretical Biology

巻 231, 号 1, p. 107-120, 発行日 2004-11-07
出版者
出版者 Elsevier
ISSN
収録物識別子タイプ ISSN
収録物識別子 00225193
DOI
識別子タイプ DOI
関連識別子 http://doi.org/10.1016/j.jtbi.2004.06.005
関連名称 10.1016/j.jtbi.2004.06.005
権利
権利情報 © 2004 Elsevier Ltd.
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