Table 2.

Relative efficiencies for Model A under various r² combinations and allele frequencies. The first column shows the r² values between the causal and tag SNPs. Various combinations of allele frequencies are investigated. Each entry of the table gives the ratio of sample sizes that lead to the same power. All results are based on 2000 repetitions.

			Allele Frequencies
( $r_1^2,r_2^2$)	$r_1^2\times r_2^2$	Power	(0.5,0.4)	(0.5,0.3)	(0.5,0.2)	(0.4,0.3)	(0.4,0.2)	(0.3,0.2)
(0.9,0.9)	0.81	0.3	0.771	0.762	0.760	0.775	0.772	0.761
		0.6	0.785	0.791	0.790	0.783	0.789	0.772
		0.9	0.794	0.787	0.783	0.774	0.794	0.792
(0.9,0.7)	0.63	0.3	0.589	0.614	0.669	0.610	0.639	0.655
		0.6	0.602	0.603	0.642	0.617	0.649	0.668
		0.9	0.581	0.615	0.661	0.620	0.67	0.668
(0.9,0.5)	0.45	0.3	0.411	0.465	0.500	0.432	0.505	0.535
		0.6	0.413	0.443	0.511	0.445	0.531	0.531
		0.9	0.415	0.449	0.507	0.458	0.521	0.549
(0.7,0.7)	0.49	0.3	0.439	0.47	0.467	0.486	0.483	0.518
		0.6	0.452	0.443	0.473	0.478	0.486	0.523
		0.9	0.440	0.466	0.474	0.464	0.503	0.503
(0.7,0.5)	0.35	0.3	0.310	0.316	0.363	0.353	0.389	0.410
		0.6	0.305	0.322	0.373	0.347	0.398	0.409
		0.9	0.313	0.331	0.393	0.336	0.390	0.422
(0.5,0.5)	0.25	0.3	0.217	0.233	0.259	0.241	0.261	0.310
		0.6	0.216	0.233	0.262	0.241	0.274	0.297
		0.9	0.218	0.235	0.266	0.241	0.269	0.300