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st: re: determining differences between intercepts after regression


From   Christopher Baum <baum@bc.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: re: determining differences between intercepts after regression
Date   Wed, 18 Feb 2009 15:47:12 -0500

<>
Martin said
See whether their confidence intervals overlap...
One can be a bit more formal than that. The test does not contradict Martin's eyeball method, but it has a statistical foundation:

-----------------------
sysuse auto,clear
reg price mpg headroom trunk if foreign
est store for
reg price mpg headroom trunk if !foreign
est store dom
suest for dom
test [for_mean]_cons = [dom_mean]_cons
------------------------

Kit Baum, Boston College Economics and DIW Berlin
http://ideas.repec.org/e/pba1.html
An Introduction to Modern Econometrics Using Stata:
http://www.stata-press.com/books/imeus.html

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