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Unclear meaning

Posted by droodman on 11 May 2012 at 02:01 GMT

country fixed effects, clustered by country
http://plosmedicine.org/article/info:doi/10.1371/journal.pmed.1001214#article1.body1.sec3.p3

Standard errors can be "clustered by country" but I don't think country fixed effects can be.

No competing interests declared.