Count-data models are used to analyze the relationship between patents and research and development spending at the firm level, accounting for overdispersion using a finite mixed Poisson regression ...

The Canadian Journal of Statistics / La Revue Canadienne de Statistique, Vol. 15, No. 3 (Sep., 1987), pp. 209-225 (17 pages) A number of methods have been proposed for dealing with extra-Poisson ...