Exploring Risk Factors with Crash Severity on China Two-Lane Rural Roads Using a Random-Parameter Ordered Probit Model

Table 5

Goodness-of-fit measures for fixed- and random-parameter ordered probit models.

Model statistics	Fixed-parameter ordered probit model	Random-parameter ordered probit model
Number of observations, n	1049	1049
Number of parameters, K	17	7
AIC	2198.80	2158.20
Log-likelihood	−1080.42	−1066.12
Degrees of freedom	10
	28.60
value	0.01