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st: AW: unbalanced panel


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: AW: unbalanced panel
Date   Thu, 22 Jul 2010 13:05:23 +0200

<> 

No, it is not hell! Collinearity between the independent vars and the panel
identifier prevents Stata from estimating your model. This would be the
reaction of every other software as well, I guess. 

Find out which variable is causing the problem! To this end, type 

*************
xtset
corr `r(panelvar)' x*
*************

where "x*" should be replaced with your independent variables that you had
fed to -xtreg- when the problem occurred. Any correlation off the main
diagonal should be examined whether it approaches 1 or -1.

HTH
Martin

-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von
sdimou@cc.uoi.gr
Gesendet: Donnerstag, 22. Juli 2010 12:52
An: statalist!!!
Betreff: st: unbalanced panel

Dear users!
Having destringed and sorted my data, I tried the xtreg command for my
unbalanced panel!
But... "independent variables are collinear with the panel variable"
What should I do???
...Stata seems a hell for me!!!

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