Hi all,
I have a panel data set of 18 years and 50 regions. My dependent variable is a count one, with over-dispersion. Hausman test indicates the use of fixed effects. Initially I thought that I should use Negative Binomial Fixed Effects (NBFE), but after reading some posts in the Forum I decided to use Poisson. So I use -xtpoisson [depvar] [indvar] , fe- command. My dependent variable is victims of car accidents. As I can understand I cannot use rates (for example victims per 1000 inhabits) because then I cannot use Poisson. However, all regions have different population. Is it right to have just the number of car accident victims? If not how can I engage victims and population of each region in analysis, in order to have proper and strong results?
Thank you in advance.