Phase diagrams of cooperation ratios in population (IMAGE)

Rissho University

Phase diagrams of cooperation ratios in population

Caption

x-axis represents the initial perfect defector ratio (η), and y-axis represents reputation cost (γ ). In accordance with the values of η and γ , there are two phases: one in which cooperation dominates (shown in blue), and another in which defection dominates (shown in red). The four norms in the upper row achieve cooperation robustly for η, while the four on the left side achieve cooperation robustly for γ . The social norm GBBK (L8) has the widest cooperation area.

Credit

Hitoshi Yamamoto at Rissho university

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