Antisocial rewarding in structured populations.

Area of Science:

• Evolutionary game theory
• Social behavior
• Collective action

Background:

• Cooperation in collective action dilemmas often collapses without incentive mechanisms.
• Prosocial rewarding (shared among cooperators) can sustain cooperation.
• Antisocial rewarding (by defectors) can undermine cooperation, even in spatial structures.

Purpose of the Study:

• To investigate the impact of prosocial and antisocial rewarding on cooperation in public goods dilemmas.
• To examine the role of spatial structure and mixed strategies in the evolution of cooperation.
• To determine if spatial structure alone is sufficient to prevent antisocial rewarding from deterring cooperation.

Main Methods:

• Game-theoretic modeling with mixed strategies and weak selection.
• Validation using individual-based simulations.
• Analysis of the evolutionary dynamics of prosocial and antisocial rewarding.

Main Results:

• Increasing reward funds supports prosocial rewarding but hinders its invasion.
• Spatial structure does not consistently prevent antisocial rewarding from deterring cooperation.
• Spatial structure can, in some cases, select against prosocial rewarding.

Conclusions:

• Additional mechanisms beyond spatial structure are necessary to prevent antisocial rewarding from undermining cooperation in public goods dilemmas.
• The interplay between reward fund size, prosocial/antisocial rewarding, and spatial structure is complex.
• Understanding these dynamics is crucial for designing effective cooperation strategies.