From | David Kantor <dkantor@jhu.edu> |
To | statalist@hsphsun2.harvard.edu |
Subject | Re: st: Requirement(s) for a match merge |
Date | Wed, 30 Mar 2005 12:39:45 -0500 |
At 04:07 PM 3/30/2005 +0000, Louis Boakye-Yiadom wrote:
Dear All,As I understand it, it's not required.
Is it true that "for a match merge to work, the identifier or identifiers must uniquely identify each observation"? I found this statement in sample lecture NC 101 (one of StataCorp's NetCourses), but I thought that this requirement (of the id uniquely identifying each observation) is often desirable, but not necessary in all cases. Any insights will be appreciated. Thank you.
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