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st: query


From   "Santiago Fernandez" <correosantiagojavier@hotmail.com>
To   statalist@hsphsun2.harvard.edu, ddrukker@stata.com
Subject   st: query
Date   Thu, 22 Feb 2007 16:51:03 +0000

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I estimated a system of equations using the "seemingly unrelated equations
(SUR)" method. The problem is that I get a negative R squared. I don=B4t kn=
ow
how it can be possible, accounting for the definition of the R squared. =BF=
How
I can explain this fact? =BFWhich is the reason? =BFHow I can justify it?.
Thank you for your time.

Santiago Fernandez. Argentina.

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