Extended Data Fig. 3 ∣. ${\mathit{r}}_{\mathbf{admix}}$ estimation is robust to genetic architecture and SNP set.

We performed $r_{\text{admix}}$ estimation under the assumption of alternative genetic architecture and SNP set on real trait analysis across PAGE and UKBB. We compared $p$-values (for one-sided test of $H_0:r_{\text{admix}}=1$) of our default setting (using frequency-dependent genetic architecture and imputed SNPs; Table 1) to those obtained using GCTA genetic architecture and imputed SNPs (a), and to those obtained using frequency-dependent genetic architecture and HM3 SNPs (b). Numerical results are reported in Supplementary Table 8.