Format

Send to

Choose Destination
PLoS Comput Biol. 2006 Dec 29;2(12):e178.

Stern-judging: A simple, successful norm which promotes cooperation under indirect reciprocity.

Author information

1
Centro de Física Teórica e Computacional and Departamento de Física da Faculdade de Ciências, Lisbon, Portugal.

Abstract

We study the evolution of cooperation under indirect reciprocity, believed to constitute the biological basis of morality. We employ an evolutionary game theoretical model of multilevel selection, and show that natural selection and mutation lead to the emergence of a robust and simple social norm, which we call stern-judging. Under stern-judging, helping a good individual or refusing help to a bad individual leads to a good reputation, whereas refusing help to a good individual or helping a bad one leads to a bad reputation. Similarly for tit-for-tat and win-stay-lose-shift, the simplest ubiquitous strategies in direct reciprocity, the lack of ambiguity of stern-judging, where implacable punishment is compensated by prompt forgiving, supports the idea that simplicity is often associated with evolutionary success.

PMID:
17196034
PMCID:
PMC1761656
DOI:
10.1371/journal.pcbi.0020178
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Public Library of Science Icon for PubMed Central
Loading ...
Support Center