Figure 4.

The performance of the gamma and three-step models when fitted to bimodal DFEs. We simulated two-spike DFEs with one spike fixed at N_es₁ = 0 and we varied the selection strength (N_es₂) and probability density (p₂) of the second spike. (A) ΔlogL between the three-step and gamma models fitted to the simulated DFEs as a function of N_es₂ and p₂. We also compared the % rel. error in estimating (B) $\overline{N_{\text{e}}s}$ and (C) $\bar{u}$. Positive and negative values of % rel. error signify overestimation and underestimation of these parameters, respectively.