Fig. 4

Mean-field approximation, with the vector fields of the dynamics of the three feasible strategies (Lazy, trusty, Smart) in four different cases. Parameters are as follows: A {r = 1/100, b = 1/10}, B {r = 1/100, b = 1/2}, C {r = 2/10, b = 65/100}, D {r = 1/100, b = 6/10}. Note that the parameter set for A is not the same as in the other figures, as we wanted to show a case where Lazy does not win. In all cases, the rest of the parameters are {n = 9, k = 0.3, c0 = 1, c = 0.3}