Table 3 Simulation mean square errors (SMSE) and efficiencies (SEFF) of estimating Q _y (τ|x),m=1000,n=300,N=1000

S M S E(Q _R (τ))

2.0533 ×10⁸

2.0103 ×10⁸

2.7731 ×10⁸

5.1199 ×10 ⁸

1.7458 ×10⁹

S M S E(Q _W(f)(τ))

1.4939 ×10⁸

1.4146 ×10⁸

2.2462 ×10⁸

4.5520 ×10⁸

1.7161 ×10⁹

S E F F(Q _W(f)(τ))

1.6770

1.4211

1.2346

1.1248

1.0174