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Antwort: Re: st: Direction of the effect of the cluster command on the standard error depends on the inclusion of a control variable


From   Justina Fischer <JFischer@diw.de>
To   statalist@hsphsun2.harvard.edu
Subject   Antwort: Re: st: Direction of the effect of the cluster command on the standard error depends on the inclusion of a control variable
Date   Thu, 6 Jan 2011 01:42:25 +0100

... I would use cluser only if it produced at least 30 clusters....
in a pseudo panel, you could also cluster at the country-year level.

JF



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