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B."],"published-print":{"date-parts":[[2019,3,27]]},"abstract":"<jats:p>Sustaining cooperation among unrelated individuals is a fundamental challenge in biology and the social sciences. In human society, this problem can be solved by establishing incentive institutions that reward cooperators and punish free-riders. Most of the previous studies have focused on which incentives promote cooperation best. However, a higher cooperation level does not always imply higher group fitness, and only incentives that lead to higher fitness can survive in social evolution. In this paper, we compare the efficiencies of three types of institutional incentives, namely, reward, punishment, and a mixture of reward and punishment, by analysing the group fitness at the stable equilibria of evolutionary dynamics. We find that the optimal institutional incentive is sensitive to decision errors. When there is no error, a mixture of reward and punishment can lead to high levels of cooperation and fitness. However, for intermediate and large errors, reward performs best, and one should avoid punishment. The failure of punishment is caused by two reasons. First, punishment cannot maintain a high cooperation level. Second, punishing defectors almost always reduces the group fitness. Our findings highlight the role of reward in human cooperation. In an uncertain world, the institutional reward is not only effective but also efficient.<\/jats:p>","DOI":"10.1098\/rspb.2019.0001","type":"journal-article","created":{"date-parts":[[2019,3,27]],"date-time":"2019-03-27T09:34:48Z","timestamp":1553679288000},"page":"20190001","update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":27,"title":["The competitive advantage of institutional reward"],"prefix":"10.1098","volume":"286","author":[{"given":"Yali","family":"Dong","sequence":"first","affiliation":[{"name":"School of Systems Science, Beijing Normal University, Beijing 100875, People\u2019s Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4635-1389","authenticated-orcid":true,"given":"Tatsuya","family":"Sasaki","sequence":"additional","affiliation":[{"name":"F-power Inc., Roppongi 1-8-7-2F, Minato, Tokyo 106-0032, 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