Figure 4

Power, false positive rates, and false discovery rates for a) iHS and b) ALnLH _u . To obtain critical values, we combined loci from neutral simulations with loci from selection simulations in proportion to the fraction of the genome influenced by positive selection [12]. Our implementation of each test followed the methodology employed in the empirical genome scans from [5] (iHS) and Wang et al., 2006 (ALnLH). The false discovery rate was between 0 and 0.53 for iHS, and between 0.74 and 0.96 for ALnLH_u. To approximate the histories of the populations in the original studies, we combined results from simulations of African and European populations based on the best fitting model in [9]. The locus recombination rate for each simulation was set to an exponential random variate with mean equal to 1 cm/Mb. For other simulation parameters, see Figure 2.