Illustration of coalescence times (A) and gene diversities (B) plotted against geographic distance from East Africa, computed through landmasses. The continuous lines represent analytical expectations from the model, and the unblackened circles represent actual values for 52 populations from the CEPH human genetic–diversity panel. In this figure, parameter values for the simulations are as follows: K0=1,000, r=0.85, K=800, Km=150, and the number of generations=2,392.