Figure 1.—

Bias and absolute error for MIGRATE version 2.3. Each point is the median scaled mutation rate θ, bias, or error of 50 data sets per sample size and scaled population size θ_T. (Left) Using the stepwise mutation model; (right) using the Brownian motion approximation. Data sets, scale and calculations of bias, and absolute error are the same as in Figure 1 of RoyChoudhury and Stephens (2007); for reference, the bias and absolute error of their estimator for θ_T = 32, taken from their Figure 1, is shaded.