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
[email protected]
Cell: 919-358-3040
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