Table 3.

Estimation of the change plane parameters and misspecification rates

		B1			B2			B3
Treatment effect η	Parameter	Bias	SD	MIS	Bias	SD	MIS	Bias	SD	MIS
0.2	γ0	−0.083	0.360	0.350	−0.083	0.360	0.316	−0.085	0.364	0.322
	γ1	−0.237	0.473		−0.224	0.478		−0.248	0.476
	γ2	−0.495	0.626		0.493	0.617		−0.509	0.630
−0.2	γ0	−0.089	0.382	0.325	−0.081	0.378	0.325	−0.074	0.385	0.337
	γ1	−0.227	0.463		−0.232	0.476		−0.243	0.483
	γ2	−0.502	0.620		−0.492	0.609		−0.537	0.634
0.5	γ0	0.055	0.220	0.092	0.067	0.225	0.098	0.071	0.215	0.099
	γ1	−0.072	0.300		−0.077	0.307		−0.075	0.319
	γ2	−0.051	0.134		−0.051	0.125		−0.062	0.146
−0.5	γ0	0.060	0.246	0.112	0.062	0.246	0.110	0.064	0.238	0.107
	γ1	−0.060	0.326		−0.054	0.323		−0.049	0.315
	γ2	−0.082	0.167		−0.085	0.180		−0.076	0.156
0.8	γ0	0.038	0.116	0.043	0.043	0.121	0.044	0.046	0.118	0.047
	γ1	−0.017	0.163		−0.017	0.106		−0.011	0.172
	γ2	−0.013	0.069		−0.014	0.069		−0.016	0.072
−0.8	γ0	0.051	0.161	0.060	0.053	0.162	0.060	0.053	0.156	0.057
	γ1	−0.029	0.207		−0.032	0.211		−0.019	0.197
	γ2	−0.025	0.084		−0.025	0.086		−0.024	0.083

^†B, Baseline effect model; B1 = ϕ₁(X_i; θ), B2 = ϕ₂(X_i; θ), B3 = ϕ₃(X_i; θ). Bias, bias of the estimates; SD, sample standard deviation of the estimates; MIS, misclassification rate for the subgroup.