Table 7. Comparison of converted estimates obtained with IM and IIM models.

	$\mathrm{I}{\mathrm{M}}_{\text{wh}}$	IM1	IIM3
Time since onset of speciation	3.040	3.240	3.624
Time since isolation	—	—	1.503
Size of ancestral population	3.060	4.310	3.549
Current size of D. simulans population	5.990	6.120	7.182
Current size of D. melanogaster population	2.440	2.700	2.871
Size of D. simulans population during IIM gene flow period	—	—	3.640
Size of D. melanogaster population during IIM gene flow period	—	—	2.092
Migration rate (D. simulans $\to$ D. melanogaster)	0.013	0.012	0.064
Migration rate (D. melanogaster$\to$ D. simulans)	0.000	0.000	—

Times are given in millions of years; population sizes are given in millions of individuals; the migration rates stated represent the number of sequences that migrate per generation, forward in time. The model $\mathrm{I}{\mathrm{M}}_{\text{wh}}$ is the IM model fitted by Wang and Hey (2010).