Bookmark and Share

Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at

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

Re: st: mean centering

From   David Hoaglin <>
Subject   Re: st: mean centering
Date   Mon, 21 Jan 2013 12:53:24 -0500


Part of the students' problem comes from their thinking that their
model controls for female*income when it actually adjusts for the
contribution of female*income.  They associate "controls for
female*income" with holding female*income constant, but that is not
what multiple regression does.

David Hoaglin

> I started teaching centering because my students were making statements like
> "once you control for female*income, the effect of female becomes
> insignificant." But centering also makes the results more intelligible.
*   For searches and help try:

© Copyright 1996–2018 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   Site index