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Re: st: What should I do if stata can not show the result of nbreg


From   Maarten Buis <[email protected]>
To   [email protected]
Subject   Re: st: What should I do if stata can not show the result of nbreg
Date   Sun, 8 Jan 2012 15:44:01 +0100

On Sun, Jan 8, 2012 at 9:24 AM, Ye SUN wrote:
> My dependent variable is count number: the number of boards that a
> director serves in (this kind of data seems not fit to poisson)
>
>  I first try poisson regression and get the results and then I  try
> -estat gof-  to test whether there is overdispersion problem, it is
> insignificant indicating no overdispersion problem I think.
> I also try -zip- and get similar results, and vuong test indicates
> there is no excess zero problems I think.
>
> I also want to try negative binomial regression,(  nbreg  and zinb ),
> but stata run for quite a long time and still run without showing any
> results. What does that mean?



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