Comparison between numerical results and analytical estimates. (A) Invasion behaviour for the proportionate mixing case. D
/V as a function of α and η for the case r = 0. The colour code is proportional to the average value of D
/V as computed from 5000 stochastic runs. The white line corresponds to the global invasion threshold R∗(α,η) = 1 computed solving numerically the analytical equations. (B) Invasion behaviour for the assortative mixing case. D
/V as a function of ε for η = 0.5 and three different values of α, 0.1, 0.15, 0.2. The coloured arrows indicate for the three cases the critical values of ε for which the condition R∗ = 1 is satisfied, as obtained by the analytical equations.