Research Article
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 . |
|
|