Figure 3. AGoS on BA networks.

(a) Starting from a defection dominant PD played at an individual level, a coordination dynamics emerges at a global, population-wide scale, for the three values of B depicted. (b) Evolution of the unstable root x_L of G^A(j,t) (open circles), exhibiting the time-dependence of the global dynamics; solid (dark blue) line and (light blue) crosses show two independent evolutionary runs starting from 50% of Cs and Ds randomly placed. The ultimate fate of Cs in each run depends on whether the population composition crosses over the time-dependent value x_L of G^A(j,t) thereby overcoming the dynamical coordination barrier during evolution. (B  = 1.25, N  = 10³, <k> = 4 and β = 0.1). BA networks were obtained combining growth and preferential attachment, following the model proposed by Barabási and Albert [61].