|
| Poisson | Negative binomial | Zero-inflated Poisson | Zero-inflated Negative binomial |
| No injury accidents | ||||
| alpha | ? | 1.0921 (17.67) | ? | 0.7650 (13.12) |
| −2 LL | 9067.2 | 5368.8 | 7710.2 | 5271.7 |
| Vuong statistic | ? | ? | 10.60 | ? |
| AIC | 9083.2 | 5386.8 | 7742.2 | 5305.7 |
| BIC | 9093.4 | 5398.3 | 7762.6 | 5327.3 |
| Injury or fatal accidents | ||||
| alpha | ? | 0.7718 (7.65) | ? | 0.6535 (7.14) |
| −2 LL | 2485.1 | 2346.5 | 2360.3 | 2320.1 |
| Vuong statistic | ? | ? | 3.83 | ? |
| AIC | 2501.1 | 2364.5 | 2392.3 | 2354.1 |
| BIC | 2511.3 | 2376.0 | 2412.7 | 2375.7 |