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physics.soc-ph2026
Evolutionary Dynamics of Reputation-Based Voluntary Prisoner's Dilemma Games
Chen Shen, Zhao Song, Xinyu Wang +4
Cooperation underlies many natural and artificial systems. While voluntary participation can sustain cooperation without informational assumptions, real interactions are rarely ano…
physics.soc-ph2025
Non-participant externalities reshape the evolution of altruistic punishment
Zhao Song, Chen Shen, Valerio Capraro +1
While voluntary participation is a key mechanism that enables altruistic punishment to emerge, its explanatory power typically rests on the common assumption that non-participants…
physics.soc-ph2025
Network reciprocity turns cheap talk into a force for cooperation
Zhao Song, Chen Shen, The Anh Han
Non-binding communication is common in daily life and crucial for fostering cooperation, even though it has no direct payoff consequences. However, despite robust empirical evidenc…