Comment on Ghang and Nowak "Indirect reciprocity with optional interactions"
نویسنده
چکیده
The purpose of this note is to point out some simple mathematical errors in the article "Indirect reciprocity with optional interactions" (Journal of Theoretical Biology 365 (2015) 111) by Whan Ghang and Martin Nowak, which a¤ect their results and conclusions. We note various ways that these errors could be xed, but all require fundamental revisions of their model and lead to counterintuitive conclusions. We also discuss their use of a Nash equilibrium (as opposed to an evolutionary stability) approach in deriving conditions for the evolution of cooperation with indirect reciprocity, and mention some precedents for their model which have appeared in the biology and economics literature.
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