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Public goods games on adaptive coevolutionary networks.

Elgar Pichler1, Avi M Shapiro2

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Cooperation can emerge and persist in social networks even without complete information. Players adapt strategies and connections, leading to productive societies despite fluctuating payoffs in Public Goods Games.

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Area of Science:

  • Social Sciences
  • Game Theory
  • Computational Social Science

Background:

  • Cooperation is crucial for productive societies, often studied using Public Goods Games (PGGs).
  • In PGGs, cooperators contribute, while all players benefit, but defection is typically the Nash Equilibrium in well-mixed populations.
  • Understanding cooperation dynamics in complex social structures is essential.

Purpose of the Study:

  • To investigate the coevolutionary dynamics of cooperation in a low-information Public Goods Game on a complex network.
  • To explore how individual adaptation of strategies and social connections influences cooperative behavior.
  • To determine if cooperation can emerge and be sustained under conditions of limited information and fluctuating payoffs.

Main Methods:

  • Simulated a Public Goods Game on a complex network with adaptive agents.
  • Agents adjusted their strategies (cooperate/defect) and social connections based on relative payoffs and greediness.
  • The model incorporated low information, meaning agents did not know others' strategies or network positions.

Main Results:

  • Cooperation can arise and persist even when agents have limited information about others.
  • Adaptive strategies and network modifications by players facilitate the emergence of cooperation.
  • The system demonstrated resilience, with cooperation enduring despite short-term payoff fluctuations.

Conclusions:

  • Cooperative behavior is not solely dependent on complete information or static social structures.
  • Agent adaptation in strategy and connectivity can drive cooperation in complex networks.
  • This study offers insights into the conditions favoring cooperation in realistic social settings.