Variance, norms and cooperative behavior in public goods games

Area of Science:

• Behavioral Economics
• Social Psychology

Background:

• Cooperative behavior is crucial for societal functioning.
• Understanding factors influencing cooperation, such as social norms and group dynamics, is essential.
• Distribution heterogeneity, or variance in contributions, is an understudied aspect of cooperative behavior.

Purpose of the Study:

• To investigate the relationship between the variance of others' contributions, social norms (empirical and normative expectations), and cooperative behavior.
• To determine the impact of contribution variance on individual contributions and social norm perceptions.
• To explore the mediating role of social norms in the relationship between variance and cooperation.

Main Methods:

• Utilized a classic linear public goods game experiment.
• Measured participants' contributions, empirical expectations, and normative expectations.
• Analyzed the impact of the variance in group members' contributions on individual behavior and perceptions.

Main Results:

• Increased variance in group members' contributions negatively affected individual contributions, empirical expectations, and normative expectations.
• Deviations from the mean contribution, both positive and negative, were perceived as less socially appropriate.
• A strong relationship was observed between variance, social norms, and cooperation, but social norms did not significantly mediate this relationship.
• Free riders and cooperators showed distinct behavioral patterns but similar normative expectations; free riders had lower empirical expectations than cooperators.

Conclusions:

• Contribution variance is a significant factor influencing cooperative behavior and social norm perceptions in public goods games.
• Social norms do not fully mediate the effect of variance on cooperation, suggesting other mechanisms at play.
• Understanding the distinct expectations of different behavioral types (e.g., free riders vs. cooperators) is key to comprehending group dynamics and informing management practices.