Simulations of the evolutionary dynamics for the collective-risk dilemma with multiple players and multiple rounds.

<p>Each graph depicts the average payoff for various , measured in fractions of the initial endowment (the grey shaded area represents the set of all possible average payoffs). (a) A collective-risk game with rounds and varying group size, (b) a collective-risk game with players and varying round number (averages over generations, number of games per generation , mutation rate , and the standard deviation for mutations in the thresholds is set to ).