(A) Estimation of Ψ by MMC-ABC. Estimates were averaged over 100 replicate populations of size with values of Ψ and N drawn from priors and , demonstrating the robustness of MMC-ABC to mis-specification of census size. True values of Ψ are indicated by the dashed line. (B) Estimation of Ψ by MMC-ABC, with estimates averaged over 100 replicate populations of size with either the correct value of N or an incorrect value of N
specified, demonstrating the nonlinear relationship between N and under the Ψ-coalescent, with mis-specification of N having little effect on the accurate estimation of Ψ when Ψ is large.