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st: covariance matrix for residuals

From   Dragutin Culinovic <>
To   STATA List <>
Subject   st: covariance matrix for residuals
Date   Tue, 07 Aug 2007 11:39:51 +0200

I have few reduced form equations:
How can I get covariance matrix (3x3) of resiudals u1,u2,u3?
I can do this by computing new variables form regression coeficients, but I supose that there is smarter way in Stata to do this.
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