Table 1. Accuracy of TPSC.

	M
Statistic	2.5	25	250
Average $\widehat{\Theta }$	0.048	0.043	0.047
Median $\widehat{\Theta }$	0.045	0.041	0.045
Average $\widehat{M}$	10.265	31.874	365.95
Median $\widehat{M}$	4.448	19.845	237.67
Coverage of Θ	86%	91%	85%
Coverage of M	81%	92%	86%

Shown are maximum-likelihood estimates of mutation-scaled migration rates M and mutation-scaled population size Θ assuming the genealogy is known. For each M, 1000 genealogies were simulated using “true” parameter values Θ = Θ₁ = Θ₂ = 0.04 and M = M₁₂ = M₂₁ = [2.5, 25, 250]. The true number of migrants 4N_em = ΘM is [0.1, 1, 10].