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st: merge/joinby with if condition

From   Kit Baum <>
Subject   st: merge/joinby with if condition
Date   Wed, 17 Aug 2005 13:18:22 -0400

Taavi said

Tried to merge and used the condition afterwards. It seemed to work,
thank you.
However the section 2) below raised another question. I have several
observations per id in both files, does it matter?

If you have a many-to-many merge (ID not unique in either master or using file) read the manual description of many-to-many merges and the problems they involve. It is tricky to deal with that sort of thing.

Kit Baum, Boston College Economics

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