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st: how to drop repeated observations?

Subject   st: how to drop repeated observations?
Date   Sat, 21 Feb 2009 23:02:35 +0100 (CET)


I'm new in using Stata and I have a dataset with french
firms'immatriculation numbers (this variable is called siren). I would
like to drop observations when the same siren appears for the second, the
third...time, but I don't achieve to do that.
Thank you very much for your help.

Yours sincerly,

Isabelle Roux

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