Markus <[email protected]>:
You want -poisson-, -nbreg-, -zip-, -zinb-, and related models, and a
textbook--see also
http://www.stata.com/support/faqs/stat/#simple
Also note education and #kids are endogenously determined; see
therefore -ivpois- on SSC or
http://www.stata.com/statalist/archive/2008-02/msg00894.html
On Wed, Feb 27, 2008 at 12:41 PM, <[email protected]> wrote:
> Hello everyone,
>
> I have some basic questions about Count Data Models.
> I am trying to estimate the total number of children a woman gives birth to
> dependend on some explanatory variables, like f.e. education_high,
> education_low and age.
>
> F.E. Amount of Children= f(educ_high, educ_low, age)
>
> I want to use a Count Data Model, since Poisson distribution seems to be the
> proper assumption for it.
>
> Problem: I don�t have any idea how to implement it into stata. Does stata
> have such functions? And what are the commands for them?
>
> Another problem: Someone told me that "dispersion" or "under-dispersion"
> might be a problem with a Count Data Model. I did some research but couldn�t
> find anyhting about that. Does anyone of you know whether this is true? And if
> so, can you give me a hint or literature suggestion, what "under-dispersion"
> is and how I could face it in my problem?
>
> Thanks a lot,
> Markus.
>
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