Costs for switching partners reduce network dynamics but not cooperative behaviour

Area of Science:

• Social network analysis
• Evolutionary game theory
• Behavioral economics

Background:

• Human interactions are often cooperative, and network structures can influence cooperation's evolution.
• While dynamic networks promote cooperation, the costs of network changes have been overlooked.

Purpose of the Study:

• To investigate how costs associated with forming new social partnerships affect social network dynamism.
• To determine the impact of reduced network dynamism on cooperative behavior in humans.

Main Methods:

• Experimental study involving human participants playing Prisoner's Dilemma games.
• Manipulation of costs for establishing new links within social networks.
• Analysis of network structure changes and cooperation levels under varying cost conditions.

Main Results:

• Participants significantly reduced link-breaking when costs for new partnerships increased.
• High costs led to nearly static social networks.
• Cooperation levels in Prisoner's Dilemma games remained unaffected by reduced network dynamism.

Conclusions:

• The potential to exit collaborations, rather than network dynamism itself, appears sufficient for high cooperation levels in humans.
• Costs associated with network changes strongly influence social network structure.
• Cooperative behavior is robust to changes in network dynamism when the option to leave exists.