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Re: st: Obtaining beta coefficient for an interaction term


From   frone@ria.buffalo.edu
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Obtaining beta coefficient for an interaction term
Date   Thu, 1 Mar 2007 12:01:21 -0500

Emma,

The process of obtaining the appropriate standardized regression 
coefficient for an interaction (cross--product)  is explained in ch. 3 of:

Aiken, L.S., & West, S.G. (1991).  Multiple regression: Testing and 
interpreting interactions. Thousand Oaks, CA: Sage.


****************************************************************
Michael R. Frone, Ph.D.
Senior Research Scientist
Research Institute on Addictions
State University of New York at Buffalo
1021 Main Street
Buffalo, New York 14203

Office:    716-887-2519
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E-mail:     frone@ria.buffalo.edu
Internet: http://www.ria.buffalo.edu/profiles/frone.html
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emmmasa <emmmasa@yahoo.com> 
Sent by: owner-statalist@hsphsun2.harvard.edu
03/01/2007 11:29 AM
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Subject
st: Obtaining beta coefficient for an interaction term






Dear all: 
Could anyone advise how to derive the overall beta
(standardized) coefficient for an interaction term
(e.g., bX + CX^2) for a standard OLS regression?
Thanks very much.
Emma 



 
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