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st:the disadvantage of using -xi- to create indicators for categorical variables


From   "Weichle, Thomas" <Thomas.Weichle@va.gov>
To   <statalist@hsphsun2.harvard.edu>
Subject   st:the disadvantage of using -xi- to create indicators for categorical variables
Date   Mon, 20 Dec 2010 09:20:01 -0600

Stata's new factor variable notation is great.  It is very, very
flexible for specifying the baseline of preference and also when using
it in interactions.  I agree with Maarten, I don't see a use for the
-xi- notation at all.  I feel as more users get warmed up to the new
notation that they will feel the same. However, some user written
commands may not allow for the new notation and -xi- may still be
necessary.  It will be up to the authors to update the code in their
command so that we may take advantage of the new notation.

Tom Weichle
Math Statistician
Center for Management of Complex Chronic Care (CMC3)
Hines VA Hospital, Bldg 1, C202
708-202-8387 ext. 24261
Thomas.Weichle@va.gov 

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