Re: st: detecting repeated ID's

[Jeph Herrin <stata@spandrel.net>]

bysort propertyID: gen entries = _N


hth,
Jeph

On 8/5/2013 3:45 PM, David Jones wrote:
> 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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