When modelling insurance claim count data, the actuary often observes overdispersion and an excess of zeros that may be … caused by unobserved heterogeneity. A common approach to accounting for overdispersion is to consider models with some … models. This approach has interesting features: first, it allows for overdispersion and the zero-inflated model represents a …

When modelling insurance claim count data, the actuary often observes overdispersion and an excess of zeros that may be … caused by unobserved heterogeneity. A common approach to accounting for overdispersion is to consider models with some … models. This approach has interesting features: first, it allows for overdispersion and the zero-inflated model represents a …

included zero-inflated models to account for the excess of zeros and the overdispersion in the data set. In the present paper … models to demonstrate that the overdispersion in the data requires more structure if it is to be taken into account, and that …