st: RE: detecting repeated ID's

["Radwin, David" <dradwin@rti.org>]

David,

See -duplicates-, e.g.

. duplicates tag propertyid, generate(dup)
. browse if dup

David
--
David Radwin
Senior Research Associate
Education Studies Division
RTI International
2150 Shattuck Ave., Suite 800
Berkeley, CA 94704
Phone: 510-665-8274

www.rti.org


> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-
> statalist@hsphsun2.harvard.edu] On Behalf Of David Jones
> Sent: Monday, August 05, 2013 12:45 PM
> To: statalist@hsphsun2.harvard.edu
> Subject: st: detecting repeated ID's
> 
> Hi Statalist,
> 
> I have a dataset of property sales that has an identifier for the
> property ID. I want to know how many of the properties appear more
> than once and then from there I'd like to restrict the observations to
> only those that appear more than once (to see a change in sale value).
> 
> I've been doing some reading but so far haven't run across a way to do
> this very easily. Does anyone have any suggestions?
> 
> Thanks!
> David
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