st: collinearity in categorical variables

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

Thank you, my error. I was using a link provided by John Hendrickx, the 
author.

Still wondering how accepted perturb is in the statistics community.  
Searching the Statalist archives reveals very few people using it, and 
some issues using it and evaluating the output.  Still, it looks useful.

Any Stata users with experience using perturb able to comment?

Mitchell
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