Nassar et al. (1997) developed an integrated accident
risk model (ARM) for policy decisions using risk factors
affecting both accident occurrences on road sections
and severity of injury to occupants involved in the
accidents. Using negative binomial regression and a
sequential binary logit formulation, they developed
models that are practical and easy to use. Mercier et al.
(1997) used logistic regression to determine whether
either age or gender (or both) was a factor influencing
severity of injuries suffered in head-on automobile collisions
on rural highways.