Table 4 Simulation efficiency (SEFF) of estimating Q _y (τ|x),m=1000,n=300,N=1000

S E F F(Q _W(1)(τ))

1.0783

1.0729

1.0504

1.0008

1.0086

S E F F(Q _W(f)(τ))

1.6770

1.4211

1.2346

1.1248

1.0174