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Related Experiment Videos

Minimal model for tag-based cooperation.

Arne Traulsen1, Heinz Georg Schuster

  • 1Institut für Theoretische Physik und Astrophysik, Christian-Albrechts Universität, Olshausenstrasse 40, 24098 Kiel, Germany. traulsen@theo-physik.uni-kiel.de

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|December 20, 2003
PubMed
Summary

Cooperation can emerge without reciprocity through partner similarity. Oscillations in agent tolerance, driven by random changes, maintain biodiversity by segregating different agents over time.

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Area of Science:

  • Evolutionary Game Theory
  • Computational Social Science
  • Agent-Based Modeling

Background:

  • Cooperation can emerge without reciprocity when agents favor similar partners.
  • Riolo et al. observed fluctuations in tolerant agents, but the cause was unclear.

Purpose of the Study:

  • To investigate the cause and robustness of tolerance oscillations in agent-based models.
  • To identify mechanisms driving biodiversity through agent segregation.

Main Methods:

  • Solving a minimal agent-based model inspired by Riolo et al.
  • Analyzing the dynamics of agent transitions between tolerant and intolerant states.

Main Results:

  • A net surplus of random transitions from intolerant to tolerant agents is necessary for oscillations.

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  • These oscillations lead to the temporal segregation of different agent types, promoting biodiversity.
  • The transition to oscillations is triggered by a saddle-node bifurcation.

    • Conclusions:

    • Random agent transitions are key to generating oscillating tolerance and biodiversity.
    • The model provides a novel mechanism for maintaining diverse agents in a population.
    • Oscillation frequency is directly proportional to the rate of transition from tolerant to intolerant agents.