FIGURE 3.

Set of models. (a) A six‐parameter, two‐population isolation‐with‐migration model, which we use in the simulation study. The migration event is a single pulse at time $T_{\mathrm{split}}/2$, and can be in either direction. The final parameter (not shown in this diagram) is the recombination rate. (b) A five‐parameter, single‐population exponential growth model, which we use to infer histories for YRI, CEU and CHB separately. (c) A seven‐parameter, two‐population model, which we fit separately for YRI/CHB and YRI/CEU. The migration can be in either direction. (d) A seven‐parameter, two population model which we fit to CEU/CHB. Migration occurs at $T_2/2$ and can be in either direction