Figure 5. Equilibrium level of cooperation as predicted by the analytical pair approximation method.

As before, the degree of cooperation achieved in a Prisoner's Dilemma game (PDG, left) and in a Snowdrift game (SDG, right) is shown as a function of the benefit of cooperation and the incongruence between the interaction and the learning network. Since the pair approximation method is based on scenario 2, the panels should be compared with the simulation results shown in the upper left panels of Figs 2 and 3, respectively.