On a Mixed Poisson Liu Regression Estimator for Overdispersed and Multicollinear Count Data

Table 2

Factors and their levels that are considered in the design of the simulation study.

Factors	Levels	Purpose
Degrees of correlation	0.99, 0.999, and 0.9999	To examine the performance of different estimators when increasing .
Sample size	10, 20, 30, 40, and 100	To examine the asymptotic property and the performance of different estimators with .
Number of covariates	2 and 4	To examine the performance of the various estimators when increasing .
		To examine the performance of the various estimators when changing the variation of :
Intercept	−1 and 1	(i) By changing .
Overdispersion parameter 1	0.03 and 0.25	(ii) By changing .
Overdispersion parameter 2	0.02 and 0.04	(iii) By changing .