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原文連結
論文資訊
- 類型：已發表論文
- 日期：2014-02-13
摘要
Unlike other vertebrates, humans cooperate in large groups with unrelated individuals. Many authors have argued that the 演化 of such 合作 has resulted from reciprocity and other forms of contingent 合作. This argument is not well supported by existing theory. The theory of contingent 合作 in pairs is well developed: reciprocating strategies are stable when common, and can increase when rare as long as 族群 structure leads to modest levels of relatedness. In larger groups, however, it is not clear whether contingent 合作 can increase when rare. Existing work suggests that contingent strategies cannot increase unless relatedness is high, but depends on unrealistic assumptions about the effects of 族群 structure. Here we develop and analyze a model incorporating a two level 族群 structure that captures impo
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