Persistence extends reciprocity.

Area of Science:

• Evolutionary game theory
• Behavioral economics
• Social dynamics

Background:

• Conditional cooperation explains cooperation evolution by adapting behavior based on opponent's actions or reputation.
• Previous models assumed a default 'optimism' probability when opponent information is absent.
• Limited information scenarios are common in real-world interactions.

Purpose of the Study:

• To investigate the evolutionary advantage of strategies that condition behavior on one's own past actions.
• To analyze the role of persistence in the evolution of cooperation within iterated prisoner's dilemma games.
• To explore how self-referential strategies perform when opponent information is sometimes unavailable.

Main Methods:

• Evolutionarily Stable Strategy (ESS) analysis.
• Replicator dynamics modeling.
• Examination of iterated prisoner's dilemma with absent opponent information.

Main Results:

• Strategies conditioning future behavior on own past actions are evolutionarily beneficial.
• Persistence, or self-referential conditioning, facilitates the evolution of cooperation.
• This approach offers a more robust explanation for cooperation than fixed optimism.

Conclusions:

• Self-referential behavioral strategies enhance cooperation evolution.
• Persistence is a key factor in maintaining cooperation when opponent information is limited.
• This study refines our understanding of cooperation's evolutionary drivers in strategic interactions.