I have a question about Negative Binomial distribution. I’m modeling a count data, as following example:
require(MASS) require(MGCV) Model<-gam(A~B, family=nb)
Is the value returned at the top of a call to
summary() the overdispersion parameter?
summary(Model) Family: Negative Binomial(0.502) Link function: log Formula: A ~ s(B)
Is this value (0.502) the over dispersion parameter?