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st: Variable Inflation Factor (VIF) for non-linear models

From   James Bernard <>
Subject   st: Variable Inflation Factor (VIF) for non-linear models
Date   Sun, 27 Oct 2013 18:42:49 +0800

Hi all,

I would like to know if after a count model (xtpoisson command) Stata
can give me VIF of the predictors?

I looked for it in the post-estimation section of -xtpoisson-, but
could not find any thing. Is it a theoretical issues that VIF can not
be calculated for count models? Or, is it a software issues?

Is there any substitute for it in log-linear models? I don't want to
use correlations to justify absence of multicollinearity.

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