Figure 1
From: Opting out against defection leads to stable coexistence with cooperation
Cooperation levels per round for treatment compared to control experiments.
Panel (a) shows the time evolution of cooperation levels per round in C1, C2 and T respectively, with dashed line at round 60. Panel (b) shows the average cooperation levels over 60 rounds with standard errors in C1, C2 and T, respectively, which are: 0.72 ± 0.0808 in C1; 0.32 ± 0.0876 in C2; and 0.56 ± 0.0287 in T. Mann-Whitney U-test shows that the differences between C1 and C2, between C1 and T and between T and C2 are significant with p-value < 0.01 (after Bonferroni correction) (SI, Table S3).
