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st: test overdispersion xtpoisson

From   Andrea Rispoli <>
Subject   st: test overdispersion xtpoisson
Date   Sat, 3 Oct 2009 02:06:09 +0200

Dear Statalisters,
I have to choose between an xtpoisson model and an xtnbreg model. I
would like to ask how could I perform a test for overdispersion with
Stata (for instance the Cameron and Trivedi test),

Thank you very much!
Kind Regards,
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