Table 2.

Bias and standard error (SE) of β̂₁ and empirical power (PWR) for H₀ : β₁ = 0

n	Censoring within τ	Jung’s method			Optimal method
		Bias	SE	PWR	Bias	SE	PWR
(a) Under H0 : β1 = 0
100	10%	0.042	0.616	0.054	0.042	0.613	0.058
	20%	0.003	0.715	0.033	0.004	0.708	0.045
	30%	0.014	0.804	0.034	0.015	0.795	0.041
200	10%	−0.015	0.430	0.047	−0.015	0.428	0.048
	20%	0.035	0.495	0.045	0.035	0.493	0.051
	30%	0.003	0.554	0.050	0.005	0.550	0.056
300	10%	0.012	0.350	0.040	0.012	0.350	0.042
	20%	−0.001	0.400	0.046	−0.001	0.399	0.049
	30%	0.006	0.449	0.037	0.006	0.447	0.040
(b) Under H1 : β1 = 2
100	10%	0.126	1.078	0.534	0.101	1.017	0.558
	20%	0.137	1.395	0.292	0.080	1.227	0.380
	30%	0.146	1.696	0.136	0.108	1.426	0.278
200	10%	0.037	0.719	0.846	0.027	0.698	0.853
	20%	0.059	0.880	0.707	0.060	0.829	0.724
	30%	0.145	1.099	0.542	0.097	0.982	0.590
300	10%	0.044	0.573	0.964	0.040	0.561	0.965
	20%	0.040	0.709	0.865	0.038	0.673	0.878
	30%	0.065	0.848	0.732	0.050	0.785	0.769