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Updated: Jul 27, 2025
06:41
Assessment of Social Interaction Behaviors
Published on: February 25, 2011
93.5K
Evolution of norms for judging social behavior
Taylor A Kessinger1, Corina E Tarnita2, Joshua B Plotkin1,3
1Department of Biology, University of Pennsylvania, Philadelphia, PA 19104.
Summary
Cooperation can be sustained by reputations, but social norms evolve. A minority group adopting strict reputation rules can dominate a population, influencing social norm evolution and information flow.
Area of Science:
- Social dynamics
- Evolutionary game theory
- Mathematical modeling
Background:
- Reputations are crucial for maintaining cooperation in social groups.
- Understanding how social norms for reputation evolve is key to cooperation.
Purpose of the Study:
- To develop a mathematical model of cooperation based on reputation within a stratified population.
- To investigate how competing social norms influence population-level cooperation and norm convergence.
Main Methods:
- Mathematical modeling of a stratified population with group-specific social norms.
- Analysis of norm competition through individual group migration.
- Examination of the "Stern Judging" norm's impact.
Main Results:
- A minority group can achieve population dominance by adopting specific norms, like "Stern Judging."
- Stratified reputation information can destabilize cooperation without strong in-group preference.
- Individual mobility and norm adoption dynamics are critical for cooperation.
Conclusions:
- Social norm evolution is influenced by group dynamics and individual migration patterns.
- The structure of information flow significantly impacts cooperation and norm convergence.
- "Stern Judging" can be a powerful norm for achieving widespread cooperation.
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