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st: areg drops year dummies


From   Ozgur Ozdemir <ozdemirozgur@hotmail.com>
To   Stata <statalist@hsphsun2.harvard.edu>
Subject   st: areg drops year dummies
Date   Mon, 16 Jul 2012 14:00:34 +0000

Hi,
i am using areg in my pooled data  set with year dummies such as xi:areg y x1 x2 i.year, absorb(industry) but some of the years not only the first one such as 2000, 2001, 2002, 2008 etc are dropped. can anybody advice why this might happen ?



kind regards
Ozgur a
 		 	   		  
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