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st: Residuals calculation

From   Ari Dothan <>
Subject   st: Residuals calculation
Date   Fri, 9 Jul 2010 08:48:52 +0300

Hi Statalist,
I have two first-difference equations in which the idiosyncratic error
terms are delta[ehat]_it and delta[vhat]_it.
I need to calculate
Rho[ev]=Sigma_iSigma_tDelta[ehat]*Delta[vhat]/Square_root of
The results stored in e() include e(rss), but I do not know to
calculate this ratio.
Please help, thanks

Ari Dothan
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