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st: xtoverid error: internal reestimation of eqn differs from original


From   agostino@unical.it
To   statalist@hsphsun2.harvard.edu
Subject   st: xtoverid error: internal reestimation of eqn differs from original
Date   Tue, 31 Jul 2007 14:32:30 +0200

dear Stata users,
I am using the Hausman and Taylor (1981) Stata command as follows:

xi:xthtaylor dep_var x1 x2 x3 x4 x5 i.country*y2001 i.country*y2002 
i.country*y2003 i.country*y2004 i.country*y2005 i.country*y2006, endog(x1 x2 
x3 x4 )
 
when, after the regression, I run the "xtoverid" command I get the following 
error message:

xtoverid error: internal reestimation of eqn differs from original

I would really appreciate your help in understanding the reason of that!

Thanks
Maria

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