The Current and Future Use of Ridge Regression for Prediction in Quantitative Genetics

Table 3

The observed median of the of RSR and of RR relative to RSR, over 21 simulations, for different sample sizes (), number of SNPs () of which 1% causal, and heritabilities (). Ridge parameter is chosen to maximize the median .

			Median	Median /; median
5 k	500 k	0.50	0.003	1.078
10 k	500 k	0.50	0.005	1.029
20 k	500 k	0.50	0.009	1.038
10 k	100 k	0.50	0.027	1.079
10 k	200 k	0.50	0.011	1.000
10 k	500 k	0.50	0.005	1.029
10 k	500 k	0.25	0.001	1.000
10 k	500 k	0.50	0.005	1.029
10 k	500 k	0.75	0.011	1.011