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Re: st: Counting duplicates and assigning unique values


From   "David Elliott" <dcelliott@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Counting duplicates and assigning unique values
Date   Fri, 21 Sep 2007 17:51:11 -0300

Am I interpreting this correctly that you have data that you could
-tab hospid- and get something that looks like:

hospid | freq ...
___________

2000   | ##
2001   | ##
...

where ## is the number of observations/patients for that hospital.

What is not clear is what you mean by "volume group"  - do you mean to
separate hospitals into different strata based on patient volumes?  It
is possible to attach the hospital volume counts to each observation
using -bysort hospid: egen ptcnt=count(1)- . If you then -tab ptcnt-
you can see the range of patient counts.  You could then use -recode-
to divide the counts into different volume groups.

DC Elliott
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