Asymptotic level of Cooperation.
Time evolution of the cooperation level until the stationary state is reached. The results have been obtained from numerical simulations on different networks with different sizes. The Mean-Field curve is the solution of Eq. (3). P(C) = 2/3, P(D) = 1/3, P(X; t = 0) = 1, 〈k〉 = 8, ρD = 0.586, ρC = 0.053, d = 0.345, a = 0.224, γ = 0.64, β = −0.072. Averages have been taken over 103 realizations.