Table 6.

Relative bias in standard error estimates comparing three comparative methods.

Proportions of floor data (%)	Standard error estimates
	SEγ10			SEγ01
	Multilevel model floors ignored	Robust standard error	Multilevel model floors considered	Multilevel model floors ignored	Robust standard error	Multilevel model floors considered
0	0.00	−0.01	−0.01	−0.03	−0.04	−0.04
5	−0.07	−0.09	−0.03	−0.06	−0.09	−0.03
10	−0.14	−0.14	−0.05	−0.10	−0.44	0.00
15	−0.16	−0.13	−0.03	−0.16	−0.18	0.01
20	−0.21	−0.15	−0.02	−0.21	−0.23	−0.01
25	−0.27	−0.17	−0.02	−0.27	−0.27	−0.01