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Alexander J Stewart1, Todd L Parsons2, Joshua B Plotkin3

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This summary is machine-generated.

Introducing more behavioral choices in iterated games, like public goods games, can stabilize cooperation at various investment levels. However, this diversity hinders cooperation when investment returns are high.

Keywords:
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Area of Science:

  • Evolutionary Game Theory
  • Behavioral Economics
  • Social Dynamics

Background:

  • Iterated games model social interactions, typically with binary choices (cooperate/defect).
  • Real-world behavior shows greater diversity, both qualitative and quantitative.
  • Previous models often simplified individual choices.

Purpose of the Study:

  • To investigate the impact of diverse behavioral choices on the evolution of social dynamics.
  • To analyze how increased behavioral repertoire affects cooperation in public goods and rock-paper-scissors games.

Main Methods:

  • Analysis of iterated public goods games with varied behavioral strategies.
  • Examination of iterated rock-paper-scissors games with multichoice strategies.
  • Modeling the fitness landscape and invasion dynamics of different strategies.

Main Results:

  • Simple binary strategies can resist multichoice invaders in public goods games.
  • Greater behavioral choice creates a 'rugged' fitness landscape, stabilizing cooperation at multiple levels.
  • Increased choice facilitates cooperation with low returns but hinders it with high returns.
  • Multichoice strategies can invade and resist invasion in rock-paper-scissors games, promoting diversity.

Conclusions:

  • Behavioral diversity significantly alters social dynamics in iterated games.
  • The impact of increased choice on cooperation is contingent on the game's payoff structure and investment returns.
  • Even in non-transitive games, diverse strategies can evolve and persist, maintaining behavioral heterogeneity.