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re: st: Cluster question

From   David Airey <david.airey@Vanderbilt.Edu>
Subject   re: st: Cluster question
Date   Tue, 6 Mar 2007 08:15:53 -0600



This question has come up before, try a search of the archive. I think I remember the answer being somewhat model dependent. For GEE some said you needed much greater than 20 or 30 clusters. But maybe that is a good minimum.


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