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st: if qualifier


From   "Cohen, Elan" <cohened@upmc.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: if qualifier
Date   Wed, 10 Jul 2013 19:23:38 +0000

All,

I'm not sure what to make of the following:

sysuse auto
count if 10<mpg<20

A SAS-using colleague of mine typed this into Stata.  Much to her astonishment, it returned a valid yet incorrect answer.  Much to my astonishment, it did not return an error.

What is Stata doing here?  Is this behavior documented anywhere?

- Elan


--
Elan D Cohen, MS
Center for Research on Health Care Data Center
University of Pittsburgh 



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