Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: AW: st: AW: beta coefficients for interaction terms


From   "Loncar, Dejan" <LoncarD@unaids.org>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: AW: st: AW: beta coefficients for interaction terms
Date   Tue, 21 Apr 2009 16:35:57 +0200

I am wondering if it is possible to run regression: coefficients with
centered Interaction (product of centered main effect variables) and
uncentered main effects ?

> sysuse auto, clear
> egen shead = std(headroom)
> egen slength = std(length)
> egen smpg = std(mpg)
> gen ia2 = shead*slength
> reg mpg head length ia2

Thanks


-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of
lschoele@rumms.uni-mannheim.de
Sent: 21 April 2009 16:10
To: statalist@hsphsun2.harvard.edu
Subject: re: AW: st: AW: beta coefficients for interaction terms

I tried it out and got different figures for the beta coefficient.  
Thats why I asked that question.
It should give me the same figures, right?

Zitat von Christopher Baum <baum@bc.edu>:

> <>
> Why don't you just try it out?
>
> sysuse auto, clear
> egen shead = std(headroom)
> egen slength = std(length)
> egen smpg = std(mpg)
> gen ia2 = shead*slength
> egen sia2 = std(ia2)
> reg smpg shead slength sia2
> reg mpg headroom length ia2, beta
>
> Kit Baum   |   Boston College Economics and DIW Berlin   |
> http://ideas.repec.org/e/pba1.html
> An Introduction to Stata Programming   |
> http://www.stata-press.com/books/isp.html
> An Introduction to Modern Econometrics Using Stata   |
> http://www.stata-press.com/books/imeus.html
>
> *
> *   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/


*
*   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/

*
*   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/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index