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st: Re: st: Test of net balance of coefficien​ts with opposite signs


From   Maarten Buis <maartenlbuis@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Re: st: Test of net balance of coefficien​ts with opposite signs
Date   Wed, 18 Jul 2012 10:28:53 +0200

On Wed, Jul 18, 2012 at 8:03 AM, Stefan Göke wrote:
> I have a fixed effects regression with two covariates (cov1 and cov2)
> in focus and some controls.
>
> The coefficient of cov1 has a positive sign and the coefficient of
> cov2 has a negative sign, both at the 1% significance level with a
> Wald test of equality of coefficients rejecting the null hypothesis
> that the coefficients are equal at the 1% significance level. I want
> to test if "coeff1+coeff2 > 0" or "coeff1+coeff2 < 0", i.e. I want to
> test the net balance of the coefficients.

You can use -lincom- to compute the sum of the two coefficients, that
is, what you called the nett balance, and the confidence interval
around that sum.

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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