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st: -poisgof- for -xt- data?


From   "Jason Yackee" <jyackee@law.usc.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: -poisgof- for -xt- data?
Date   Mon, 13 Nov 2006 13:51:20 -0800

Dear all,

I would like to determine whether I am better off using -xtnbreg- or
-xtpoisson- to estimate a  odel using time series cross section (TSCS)
data.  The version 8 manuals discuss -poisgof- as a means of comparing
the two.  My stata 9 says that -poisgof- has been changed to -estat
gof-.  Neither works after -xt...- estimation.

Could someone suggest a way to conduct a -poisgof- type of test to help
determine whether I should be using a poisson or a negative binomial
model?


Jason Webb Yackee, PhD Candidate; J.D.
Fellow, Gould School of Law
University of Southern California
jyackee@law.usc.edu
Cell: 919-358-3040


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