Random-Parameter Multivariate Negative Binomial Regression for Modeling Impacts of Contributing Factors on the Crash Frequency by Crash Types

Table 5

Goodness-of-fit measure of six models.

Model	Total no.	Log-likelihood	AIC	BIC
Independent NB model	55	−14,352.787	29,007.581	29,602.802
Independent Poisson model	61	−16,595.848	33,441.697	33,934.501
ZIMNB model	53	−14,352.888	29,131.770	29,674.168
ZIMP model	53	−16,194.117	32,662.229	33,203.686
RPMNB model	52	−14,326.558	28,985.114	29,610.316
RPMP model	56	−14,353.079	28,996.159	29,567.814