Table 2. Distribution of fitness effects under various best-fit selective models.

Population ancestry	African	African	European	European	European	African	European	European
Demographic model	expansion	expansion	complex bottleneck	complex bottleneck	complex bottleneck	stationary	stationary	simple bottleneck
Selection model	gamma	lognormal	gamma	lognormal	exp+neut	gamma	gamma	gamma
|s|<0.00001	27.9%	28.4%	24.3%	24.6%	25.0%	22.2%	35.7%	23.5%
0.00001<|s|<0.0001	14.7%	14.3%	14.7%	15.7%	0.9%	48.2%	38.7%	16.1%
0.0001<|s|<0.01	21.9%	15.4%	23.1%	17.5%	53.7%	29.6%	25.4%	26.1%
|s|>0.01	35.5%	41.9%	37.9%	42.3%	20.5%	0.0%	0.2%	34.3%

Proportion of mutations falling into each selection interval for each population under each best-fit models. Demographic model parameters are listed in Table 3; selection model parameters are listed in Table 1 except for African American stationary gamma (α = 0.59, β = 37), and European American stationary gamma (α = 0.36, β = 120), and European American simple bottleneck gamma (α = 0.228, β = 5200).