Evolution of conditional cooperation in public good games.

Area of Science:

• Behavioral Economics
• Game Theory
• Social Psychology

Background:

• Cooperation declines in repeated public good games due to conditional cooperation and imitation of successful individuals.
• Human societies exhibit cooperation in social dilemmas, suggesting sensitivity to more than just payoffs.

Purpose of the Study:

• To investigate if humans consider both payoffs and the source of success (prestige) when imitating others in public good games.
• To model a repeated public good game incorporating heterogeneous conditional cooperators influenced by payoff and prestige.

Main Methods:

• Developed a model of a repeated public good game with heterogeneous conditional cooperators.
• Introduced two population-level parameters: affinity towards payoff and affinity towards prestige.
• Simulated agent strategy updates based on role model payoffs and prestige.

Main Results:

• High levels of cooperation can be established in populations of heterogeneous conditional cooperators.
• Cooperation is sustained within a specific range of affinity parameters for payoff and prestige.
• Social value, specifically prestige, plays a crucial role in fostering cooperation.

Conclusions:

• Prestige is a significant factor in maintaining cooperation in public good games.
• Models incorporating both payoff and prestige offer a more nuanced understanding of cooperation dynamics.
• Heterogeneous conditional cooperation, influenced by social values, can lead to sustained cooperative behavior.