Equality and efficiency shape cooperation in multiple-public-goods provision problems.

Area of Science:

• Social Psychology
• Behavioral Economics
• Decision Science

Background:

• Cooperation on public goods is essential for societal functioning.
• Individuals often face choices between multiple public goods with varying efficiency and fairness.

Purpose of the Study:

• To investigate how individuals make cooperation decisions when faced with public goods that differ in efficiency and equality of returns.
• To understand the influence of personal benefit from inequality on cooperation choices.

Main Methods:

• Five preregistered experiments involving 900 participants.
• Participants were presented with two public goods varying in efficiency and return equality.
• Analysis of cooperation patterns based on individual benefit and perceived fairness.

Main Results:

• Cooperation favored efficient and equal-return public goods.
• When the most efficient public good offered unequal returns, individuals cooperated more if they were primary beneficiaries of the inequality.
• Lower beneficiaries prioritized equal returns over efficiency, and expectations/norms influenced cooperation.

Conclusions:

• Cooperation decisions are complex, balancing efficiency with fairness.
• Personal benefit from inequality can override preferences for equal distribution.
• Understanding these dynamics is crucial for designing effective public goods policies.