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.  
   
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/