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st: dates question


From   "Grosso Anthony (University College London Hospitals NHS Foundation Trust)" <anthony.grosso@nhs.net>
To   statalist@hsphsun2.harvard.edu
Subject   st: dates question
Date   Tue, 28 Aug 2007 19:52:20 +0100 (BST)

with 3 columns (variables) of different dates. How can Stata identify/keep the earliest date for each observation?

AG

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