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Re: st: Re: determining differences between intercepts after regression


From   Ian C Zink <izink@rsmas.miami.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: determining differences between intercepts after regression
Date   Wed, 18 Feb 2009 14:53:30 -0500

Thank you all for your suggestions - I will look into the articles provided and post a new message if I have remaining questions.
Ian
Richard Goldstein wrote:
a nice description can be found in

Wolfe, R and Hanley, J (1/8/2002), "If we're so different, why do we keep overlapping? When 1 plus 1 doesn't make 2", _Canadian Medical Association Journal_, 166: 65-66

Martin Weiss wrote:
<>

Please explain!

HTH
Martin
_______________________
----- Original Message ----- From: "Jeph Herrin" <junk@spandrel.net>
To: <statalist@hsphsun2.harvard.edu>
Sent: Wednesday, February 18, 2009 8:32 PM
Subject: Re: st: Re: determining differences between intercepts after regression


Not quite. If they don't overlap, then yes, they are
different; but if they do overlap, the two intercepts
may still be significantly different at an alpha of 5%.

Martin Weiss wrote:
<>

See whether their confidence intervals overlap...

HTH
Martin _______________________
----- Original Message ----- From: "Ian C Zink" <izink@rsmas.miami.edu>
To: <statalist@hsphsun2.harvard.edu>
Sent: Wednesday, February 18, 2009 7:59 PM
Subject: st: determining differences between intercepts after regression


Dear Stata List,
I have computed two linear regressions and would like to compare the computed intercepts statistically. Is there a command or command process that can achieve this? Thank you for your assistance.
Ian

--
Ian C. Zink
Aquaculture Department - Division of Marine Affairs U. of Miami - Rosenstiel School of Marine and Atmospheric Science
4600 Rickenbacker Causeway
Miami, FL 33149
office: 305-421-4915
fax: 305-421-4675
email: izink@rsmas.miami.edu
*
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--
Ian C. Zink
Aquaculture Department - Division of Marine Affairs U. of Miami - Rosenstiel School of Marine and Atmospheric Science
4600 Rickenbacker Causeway
Miami, FL 33149
office: 305-421-4915
fax: 305-421-4675
email: izink@rsmas.miami.edu

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



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