st: collinearity in categorical variables

["Mitchell F. Berman" <mfb1@columbia.edu>]

Stata Users:

We are working on a logistic regression model with both continuous and 
categorical independent variables.

I'm familiar with collin to generate VIF and condition index.  But my 
impression and information on the internet suggests that collin is not 
appropriate for categorical variables.

What would people use to evaluate collinearity (probably not the correct 
term in this case) for categorical variables.

Some people have referenced a Stata module called perturb by John 
Hendrickx.  But I don't know that this has been vetted by the Stata 
community or statistical community in general.  And I've not been able 
to locate a functioning download site for perturb.

Thanks in advance.

Mitchell

PS-- sorry for my erroneous initial posting.
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