Favoured and beneficial strategies in social dilemmas for well-mixed populations.

<p>Parameter space of social dilemmas in well-mixed populations with the cost-to-benefit ratio as the -axis and the synergy/discounting parameter as the -axis (see Eq. (30) ). The dashed lines divide the plane into five regions, which correspond to the Prisoner's Dilemma (PD), Snowdrift Game (SD), Stag-Hunt Game (SH), Deadlock Defection (DD) and Byproduct Mutualism (BM). The three solid lines are predictions for (i) - above this line defection is beneficial; (ii) - below this line cooperation is favoured; and (iii) - below this line cooperation is beneficial. The three lines intersect at ; for , cooperation and defection may be simultaneously beneficial, while for cooperation and defection may both be detrimental. Each data point represents simulation results for invasion attempts by a single cooperator and invasion attempts by a single defector. Parameters are: selection strength , population size .