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Re: st: check for double id-numbers


From   Neil Shephard <nshephard@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: check for double id-numbers
Date   Thu, 24 Nov 2005 12:25:07 +0000

On 11/24/05, Nick Cox <n.j.cox@durham.ac.uk> wrote:
> Thanks for the recommendation, but two
> points of clarification please:
>
> 1. -duplicates- is an official Stata command
> added in Stata 8. It certainly draws upon
> -dups- but it does not offer exactly everything
> that -dups- does. Conversely, it offers
> several things that -dups- does not.
>
> 2. -dups- was written by Thomas J. Steichen
> and myself. The version in STB-41 requires
> Stata 5 and a later version on SSC requires
> Stata 6.
>

Apologies to Thomas for the glaring omission (I should have checked
the help page first), and for the lack of clarity in my overall
posting.

Neil

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