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. 2017 Apr 27;7:46709. doi: 10.1038/srep46709

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(a) Payoff against frequency of conditional (after finding out that others used more) retaliation and non-repair in the group. (b) Payoff against frequency of non-retaliation or ‘turning the other cheek’ towards transgressions of others across two consecutive rounds (in round n and n + 1). Groups with a high level of conditional retaliation and no repair made less profits overall, while groups that used a “turn the other cheek” strategy gained more.