Hi !
I'm new to the list, and I had a short question about STATA commands.
I'm working for a professor who's trying to clean up her dataset; she
told me that there was a command in STATA that automatically kept only
the data columns used to produce result (more precisely, a command that
allows one to automatically drop columns not used for a given do file)
-- do you know what this might be?
Thanks,
-- 
Adrian
http://people.fas.harvard.edu/~yow
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