Fig. 9.

Comparison of stochastic (mean of 1000 realisations, left) and deterministic (right) simulations showing the evolution $I_m$ and $〈I_m〉$ for $\epsilon =\mu =10^{-2}$ (solid curves), $\epsilon =\mu =10^{-3}$ (dotted curves) and $\epsilon =\mu =10^{-4}$ (dashed curves) with $N=10^7$, $\gamma =1,s_0=0.8$ and $\beta =4$ in all cases.