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st: RE: RE: Difference in correlation coefficients


From   "Banya, Winston" <w.banya@ic.ac.uk>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: Difference in correlation coefficients
Date   Wed, 17 Jul 2002 13:56:06 +0100

Many thanks Nick. Unfortunately I have STATA 6 and cannot use the findit
command. I have however placed in an order for STATA 7 which I hope to be
using by the end of the month. I may have to find a way of doing the
calculations manually.

Winston

-----Original Message-----
From: Nick Winter [mailto:nwinter@policystudies.com]
Sent: 17 July 2002 13:31
To: statalist@hsphsun2.harvard.edu
Subject: st: RE: Difference in correlation coefficients


> -----Original Message-----
> From: Banya, Winston [mailto:w.banya@ic.ac.uk] 
> Sent: Wednesday, July 17, 2002 4:03 AM
> To: 'statalist@hsphsun2.harvard.edu'
> Subject: st: Difference in correlation coefficients
> 
> 
> Dear All,
> 
> I  have used the pwcorr command to get correlation 
> coefficients and I am
> interested in finding the difference in the coefficients and the
> significance of the difference.
> 
> For example if I have 3 variables y1 y2 and x2 and then I do
> 
> pwcorr y1 x2 to get r1 and  pwcorr y1/y2 x2 to get r2. If there is an
> improvement in r as a result of using y1/y2 then how to 
> account for the
> improvement together with its significance.  Is there anyway 
> way I can do so
> using STATA?
> 
> Many thanks
> 

Typeing -findit correlation test- turns up, among much else, -cortesti-,
-corcor- (which is part of STB-32), one or both of which should give you
what you want.

Nick Winter
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