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st: Testing unbalanced panels


From   "Ted Lundgren" <odovakar@spray.se>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Testing unbalanced panels
Date   Thu, 26 Mar 2009 03:43:49 -0700

As a Stata newbie I have the following "simple" question to you: How do you test an unbalanced panel estimation in log-log form for autocorrelation, heteroskedasticity and multicollinearity? I have been looking everywhere on the forum, Internet and in manuals for this, but without any luck. I have also been trying commands like xtgls, lrtest, hettest, vif and xtserial, but nothing seems to work since I get differnet error messages all the time. Please: Can't anyone provide a short step-by-step guide "for dummies" on how to do this, in my particular case? I would be very grateful.

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