Need for conclusive evidence that positive and negative reciprocity are unrelated

Comment

Boris Egloff et al. Proc Natl Acad Sci U S A. 2013.

. 2013 Feb 26;110(9):E786.

doi: 10.1073/pnas.1221451110. Epub 2013 Feb 4.

No abstract available

Conflict of interest statement

The authors declare no conflict of interest.

Reply to Egloff et al.: On the relationship between positive and negative reciprocity.
Yamagishi T. Yamagishi T. Proc Natl Acad Sci U S A. 2013 Feb 26;110(9):E787. doi: 10.1073/pnas.1222349110. Proc Natl Acad Sci U S A. 2013. PMID: 23565540 Free PMC article. No abstract available.

Rejection of unfair offers in the ultimatum game is no evidence of strong reciprocity.
Yamagishi T, Horita Y, Mifune N, Hashimoto H, Li Y, Shinada M, Miura A, Inukai K, Takagishi H, Simunovic D. Yamagishi T, et al. Proc Natl Acad Sci U S A. 2012 Dec 11;109(50):20364-8. doi: 10.1073/pnas.1212126109. Epub 2012 Nov 27. Proc Natl Acad Sci U S A. 2012. PMID: 23188801 Free PMC article.

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