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Moral assessment in indirect reciprocity.

¹Faculty of Mathematics, University of Vienna, A-1090 Vienna, Austria. karl.sigmund@univie.ac.at

Journal of Theoretical Biology

|April 9, 2011

Summary

Indirect reciprocity, a key cooperation mechanism in human societies, relies on reputation assessment. Even simple rules for evaluating reputations lead to complex evolutionary dynamics and demand significant cognitive skills.

Area of Science:

Evolutionary game theory
Social evolution
Behavioral economics

Background:

Indirect reciprocity is a fundamental mechanism driving cooperation in human societies.
Reputation assessment and subsequent actions are central to indirect reciprocity.
Understanding the evolution of cooperation requires analyzing these social dynamics.

Purpose of the Study:

To provide an overview of various assessment rules in indirect reciprocity.
To analyze these rules using evolutionary game dynamics.
To explore the cognitive requirements associated with different assessment strategies.

Main Methods:

Review of different assessment rules for indirect reciprocity.
Application of evolutionary game dynamics for analysis.

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Simulation and theoretical modeling of social interactions.

Main Results:

Even basic binary assessment rules yield intricate outcomes in cooperation dynamics.
The complexity of indirect reciprocity increases with the sophistication of assessment rules.
Significant cognitive abilities are necessary for implementing these assessment strategies.

Conclusions:

Indirect reciprocity is a complex but vital aspect of social evolution.
The cognitive demands of reputation management are substantial.
Further research into the interplay of cognition and cooperation is warranted.