Table 2.

Average (sd) value $\mathcal{V}(f)$ from 200 replicates from observational studies. In both settings, the oracle f_opt attains a value $\mathcal{V}\left(f_{\text{opt}}\right)=8$ (boldface denotes the largest in each row).

	n	SIMSL	K-O-learning	K-O-learning(Prp)	SVR
Scenario 3	200	4.03 (0.97)	2.68 (0.30)	2.74 (0.29)	1.99 (0.83)
	800	5.46 (0.20)	4.06 (0.30)	4.19 (0.20)	4.09 (0.28)
Scenario 4	200	4.07 (0.72)	3.29 (0.28)	3.23 (0.28)	−0.95 (1.57)
	800	5.51 (0.19)	4.91 (0.14)	4.73 (0.17)	3.04 (0.52)