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dc.contributor.authorVAN APELDOORN, Jacobien
dc.contributor.authorSCHRAM, Arthur
dc.date.accessioned2017-02-08T15:36:42Z
dc.date.available2017-02-08T15:36:42Z
dc.date.issued2016
dc.identifier.citationPLoS ONE, 2016, Vol. 11, No.4, e0152076, OnlineOnlyen
dc.identifier.issn1932-6203
dc.identifier.urihttps://hdl.handle.net/1814/45208
dc.descriptionReceived: 23 November 2015; Accepted: 7 March 2016; Published: 4 April 2016en
dc.descriptionThis is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
dc.description.abstractIndirect reciprocity involves cooperative acts towards strangers, either in response to their kindness to third parties (downstream) or after receiving kindness from others oneself (upstream). It is considered to be important for the evolution of cooperative behavior amongst humans. Though it has been widely studied theoretically, the empirical evidence of indirect reciprocity has thus far been limited and based solely on behavior in laboratory experiments. We provide evidence from an online environment where members can repeatedly ask and offer services to each other, free of charge. For the purpose of this study we created several new member profiles, which differ only in terms of their serving history. We then sent out a large number of service requests to different members from all over the world. We observe that a service request is more likely to be rewarded for those with a profile history of offering the service (to third parties) in the past. This provides clear evidence of (downstream) indirect reciprocity. We find no support for upstream indirect reciprocity (in this case, rewarding the service request after having previously received the service from third parties), however. Our evidence of downstream indirect reciprocity cannot be attributed to reputational effects concerning one’s trustworthiness as a service user.en
dc.format.mimetypeapplication/pdfen
dc.language.isoenen
dc.publisherPublic Library of Scienceen
dc.relation.ispartofPLoS ONEen
dc.rightsinfo:eu-repo/semantics/openAccessen
dc.titleIndirect reciprocity : a field experimenten
dc.typeArticleen
dc.identifier.doi10.1371/journal.pone.0152076
dc.identifier.volume11en
eui.subscribe.skiptrue
dc.identifier.issue4en


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