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st: poisgof and the likelihood ratio test

From   "f n" <>
Subject   st: poisgof and the likelihood ratio test
Date   Mon, 19 Apr 2004 20:24:43 +0900

The results of poisgof in poisson gives supoport to the poisson model, 
while the result of test of overdispersion parameter in nbreg strongly 
favors the negative binominal model.
Why does this occur and which result is more reliable?
Thank you in advance.

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