Figure 7
Emergence of the Fermi rule in simulations of Moody conditional cooperators.
Probability of changing action in the next round as a function of the payoff difference between the focal player and the best of the players that chose the opposite action. The results are presented separately for the players who changed from cooperation to defection and those who changed from defection to cooperation (see legends). Results are obtained from simulations using the parameters of the MCC found in Plön (left), Madrid (center) and Zaragoza experiments (right). All error bars represent 99% confidence intervals. Madrid data has been binned to reduce the noise and the simulations include not only MCC but also cooperators and defectors as in the original population, to check the effect of having a truly heterogeneous population.
