Table 2.

Simulation summary for the estimation of β₀(.) over [0, 2.5]. Estimator of η₀ (a) bias (×10³), (b) standard deviation (×10³), (c) mean standard error (×10³), (d) coverage (%) of the Wald 95% confidence interval. Equal-precision confidence band: (e) coverage (%) of the 95% band. Constant coefficient test: (f) size and power (×10²) at 0.05 nominal level

		Zero intra-individual correlation						Gamma frailty of variance 0.5
	η0	(a)	(b)	(c)	(d)	(e)	(f)	(a)	(b)	(c)	(d)	(e)	(f)
Intercept	−0.08	36	132	123	89.9	86.5	100.0	40	166	157	91.0	86.5	100.0
1st slope	0.70	2	221	211	94.3	94.1	30.2	16	284	270	93.0	93.9	22.1
2nd slope	1.00	23	360	344	93.3	93.0	4.1	−9	493	445	90.9	89.1	3.8