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st: RE: repeated values of a variable


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: repeated values of a variable
Date   Wed, 17 Mar 2004 12:05:51 -0000

As a further comment, even though Richard Williams 
solved your problem: there are other answers to 
your general question. 

-duplicates- identifies observations that have 
identical values for one or more variables. 

There isn't a -duplicates keep- subcommand, but 
you could -duplicates tag- and then -drop- if 
the tagged variable was 0. 

This is not a better answer for your specific 
problem, which as said earlier can be solved
directly, but it is a general tool in this area. 

Nick 
n.j.cox@durham.ac.uk 

> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of 
> Judet Roqueta
> Sent: 17 March 2004 02:00
> To: statalist@hsphsun2.harvard.edu
> Subject: st: repeated values of a variable
> 
> 
> Is there a way to have Stata identify observations that have 
> equivalent
> values for a given variable?  Speficically, I want to trim my 
> dataset to
> individuals that live in the same household using a household id
> variable.  I want to get rid of those that live alone.  I tried using
> the egen tag and egen group commands, but that did not help.
> 

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