Pair model | Differences in LR | 1% critical value |
|---|
HNB1a vs. NB1 | 667.718*** | χ2(34) = 56.1 |
HNB2a vs. NB2 | 486.544*** | χ2(34) = 56.1 |
ZINB2a vs ZIP | 4229.739*** | χ2(1) = 6.6 |
HPMa vs. PRM | 471.855*** | χ2nn = 56.1 |
- LR denotes the likelihood ratio, HNB represents the hurdle negative binomial, NB indicates the negative binomial, ZINB means the zero-inflated negative binomial, ZIP denotes the zero-inflated Poisson, HPM represents the hurdle Poisson model, and PRM means the Poisson regression model
- aindicates the preferred model in pair comparison; and χ2(.) means chi-square test and the number in the bracket refers to degree of freedom of each model considered
- *p < 0.05, **p < 0.01, and ***p < 0.001
