st: covariance

[Carlos Rodriguez <carlosrodriguez1993@gmail.com>]

Hi,

Please, could anyone tell me what is the difference between the
covariance command and the "correlation-,coefficients" command in
Stata10?
I have read the help files but I am still unsure which to use if I
want to show whether two regressors are highly collinear or not.

thanks.
Carlos
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