Hi Reza,
thanks for your answer.
I have already used the code of Dr. Jackman for fitting the double hurdle
model, but it doesn't allow to specify different regressors for the zero and
the poisson (or negative binomial) parts, which is a bit limitative.
Moreover, I don't have Stata, I just dispose
Hi,
I have two questions. First, I'd like to compare a ZINB model to a negativ
binomial model with the Vuong test, but I can't find how to performe it from
the zicount package. Does a programm exist to do it ?
Second, I'd like to know in which cases we have to use a double hurdle model
instead of
