Fig. 3. Recommendations from the GraphNet planner.

The planner’s recommendations varied as a function of the cooperation choices of the participants involved (cooperate–cooperate, cooperate–defect, or defect–defect) and the potential change to recommend (add or delete). Plots present mean values. Error bars and bands reflect 95% CrIs, with the posterior distribution computed from a uniform prior. Since the large number of observations precludes visualizing individual data points, we present the underlying data in Supplementary Table 6. a, The GraphNet planner virtually always recommends adding cooperator–cooperator links when it has the chance (n = 1,854 chances) and rarely suggests removing them (n = 12,324 chances). b, Uniquely, the GraphNet planner recommends a mixture of adding and removing cooperator–defector links (n = 2,631 chances and n = 5,268 chances, respectively). c, The planner also avoids recommending new defector–defector links (n = 809 chances). When given the chance, it virtually always suggests removing them (n = 514 chances). d, The GraphNet planner suggests adding a number of cooperator–defector links at the beginning of the game, but makes fewer of these recommendations over time (n = 2,631 chances over all rounds). e, Moving towards the end of the game, it increasingly recommends removing cooperator–defector connections (n = 5,268 chances over all rounds).