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Re: st: checking over dispersion in XTPOISSON
From
Eric N <[email protected]>
To
[email protected]
Subject
Re: st: checking over dispersion in XTPOISSON
Date
Fri, 6 Jan 2012 10:07:51 -0500
One of the problems with Poisson is that the variance is assumed to
equal the mean which is a very restriction condition. You might wish
to try the negative binomial that also is used to analyze count data
and is less restrictive in this regard.
--Eric
On 1/5/12, Rajaram Subramanian Potty <[email protected]> wrote:
> Dear all,
>
> I would like to know how one should check for overdispersion in a
> model fitted using "xtpoisson". If one noticed overdispersion how to
> correct it or which is the alternative analysis.
>
> Thanks in advance.
>
>
> RAJARAM
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