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The joker effect: cooperation driven by destructive agents.

Alex Arenas1, Juan Camacho, José A Cuesta

  • 1Departament d'Enginyeria Informàtica i Matemàtiques, Universitat Rovira i Virgili, 43007 Tarragona, Spain. alexandre.arenas@urv.cat

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Introducing rare, destructive "jokers" into the Public Goods game unexpectedly boosts cooperation. These agents disrupt defection cycles, creating a rock-paper-scissors dynamic that paradoxically fosters cooperation among individuals.

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Area of Science:

  • Evolutionary Game Theory
  • Agent-Based Modeling
  • Social Dynamics

Background:

  • Cooperation emergence is a key challenge in evolutionary game theory.
  • The Public Goods game illustrates cooperation difficulties, where free-riding by defectors depletes resources.
  • Prior research suggests reputation, punishment, or rewards can enhance cooperation.

Purpose of the Study:

  • To investigate the impact of introducing rare, malicious agents (jokers) on cooperation dynamics in the Public Goods game.
  • To analyze the emergent behavioral patterns and their effect on cooperative strategies.

Main Methods:

  • Development of an agent-based model simulating the Public Goods game.
  • Introduction of 'joker' agents with destructive, indiscriminate actions.
  • Analysis of the resulting population dynamics and strategy interactions.

Main Results:

  • The presence of jokers induces cyclical dynamics, akin to rock-paper-scissors.
  • Jokers initially suppress defectors, allowing cooperators to thrive.
  • This disruptive cycle paradoxically leads to increased overall cooperation.

Conclusions:

  • Rare, destructive agents can unexpectedly promote cooperation in social dilemmas.
  • The introduction of 'jokers' creates a novel mechanism for sustaining cooperation.
  • This finding challenges traditional assumptions about the negative impact of destructive behavior.