. Author manuscript; available in PMC: 2014 Jun 30.

Published in final edited form as: Stat Med. 2012 Dec 12;32(14):2390–2405. doi: 10.1002/sim.5691

Table 3.

WGEE estimates of parameters, standard errors, and type I error rates based on Wald and Score tests, along with empirical standard errors and type I error rates for ZIP under MAR from 1,000 MC simulations.

Simulation summary for ZIP under missing data following MAR
β_u₀ = −1, β₀ = 1, β₁ = 1
Parameter	Mean	Standard errors		Type I error for H₀ : β₁ = 1
		WGEE	Empirical	Wald			Score
				WGEE		Empirical
Sample size of 50
β_u ₀	−1.05	0.402	0.400
β ₀	0.995	0.128	0.105
β ₁	1.000	0.168	0.151
				0.094	0.062		0.052
Sample size of 100
β_u ₀	−1.02	0.253	0.261
β ₀	1.001	0.064	0.066
β ₁	0.998	0.088	0.080
				0.087	0.058		0.043
Sample size of 200
β_u ₀	−1.01	0.176	0.177
β ₀	0.999	0.044	0.044
β ₁	1.000	0.066	0.060
				0.055	0.056		0.051