Figure 6
From: Comparing reactive and memory-one strategies of direct reciprocity
Evolving cooperation rates for (a) unconditional strategies, (i.e., strategies that use the same cooperation probability p in every round, independent of the past history), (b) reactive strategies, and (c) memory-one strategies. All graphs show the abundance of cooperation as measured by the quantity γ in Eq. (11) for the case of deterministic strategies (blue), and according to the Imhof-Nowak process for stochastic strategies (yellow; a discretised version of the continuous space of memory-one strategies would yield similar results). Dots represent simulation results, whereas solid lines represent numerically exact results derived from the invariant distribution of the evolutionary processes. Parameters: population size N = 100, ε = 0.01, and w = 10.
