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Re: st: Testing the extent of difference between two coefficients in the same model


From   Maarten Buis <maartenlbuis@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Testing the extent of difference between two coefficients in the same model
Date   Mon, 30 Jan 2012 10:22:41 +0100

On Mon, Jan 30, 2012 at 10:12 AM, Erik Aadland wrote:
> I have one variable "old" and one variable "new" plus some controls. My hypothesis is that "new" will have a larger positive influence y than will "old".

This is a so-called one-sided test. You can use -test- to test the
two-sided test that the effects of new and old are equal, and than use
the tricks discussed in
<http://www.stata.com/support/faqs/stat/oneside.html> to transform the
results in a one-sided test. An example is given at the bottom of that
FAQ.

Hope this helps,
Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany


http://www.maartenbuis.nl
--------------------------
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