Bermúdez, Lluís; Karlis, Dimitris; Morillo, Isabel - In: Risks : open access journal 8 (2020) 1/10, pp. 1-13
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 overdispersed distribution as opposed to Poisson models....
