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Re: st: xtzinb


From   David Jacobs <jacobs.184@sociology.osu.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: xtzinb
Date   Tue, 11 Nov 2003 13:43:53 -0500

I think (but am not sure) that there is a panel version of zero inflated in Green's econometrics package called Limdep. If not or if you don't want to mess with this less than user friendly package, you can cluster on time. The resulting estimates will not be as efficient as they would be with a panel estimator, but they probably will be more robust to specification errors.

Dave Jacobs

At 04:09 PM 11/11/2003 +0100, you wrote:

Dear All,
I am trying to do a negative binomial regression. My dependent
variable is a count variable, and for almost 30% of the observation the
dependent variable is zero. I have a panel dataset, therefore I am
using xtnbreg. However I couldn't find zero inflated negative binomial
regression possibility for panel data, what would be more appropriate
given the large number of zero observations. Does anyone know about
the existence of "xtzinb"?
Thanks,
Miriam


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