Behavior of the cascade size <i>S_eq</i> at equilibrium for varying standard deviation <i>σ</i>.

<p>(a) ER graphs with <i>z</i> = 10 and <i>N</i> = 10⁴; (b) SF networks with <i>z</i> = 10, <i>γ</i> = 3, and <i>N</i> = 10⁴; (c) high-school network with <i>z</i> = 5.96 and <i>N</i> = 921; (d) facebook network with <i>z</i> = 43 and <i>N</i> = 4039. The mean threshold is <i>ϕ</i>₀ = 0.50. The simulations are averaged over one thousand repetitions. (a) and (b) also show the analytic estimates (dotted lines) based on the tree-like approximation (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0143020#sec002" target="_blank">Materials and Methods</a>) [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0143020#pone.0143020.ref014" target="_blank">14</a>].