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Re: st: Comparing weighted and unweighted distributions via Chi2 test

From   Stas Kolenikov <>
Subject   Re: st: Comparing weighted and unweighted distributions via Chi2 test
Date   Thu, 9 Jun 2011 09:56:56 -0500

If you kind find this paper, it will be quite useful: Pfeffermann is
one of few statisticians who is aware of Hausman (1978) test that just
celebrated a third of a century... think about the time for good ideas
to diffuse from one discipline to another. This is the test that's
directly applicable to your case, but Stata is reluctant to run it
with weighted data, so you'd have to find ways to force it to perform

On Wed, Jun 8, 2011 at 4:05 PM, Duru <> wrote:
> Dear all,
> In order to test if my nonresponse weights change my survey outcomes
> substantially, I want to conduct Chi2 tests or t-tests between
> weighted and unweighted distributions/means for a number of variables.
> Since, I dont know a practical way to do this on Stata, I have to
> insert weighted and unweighted frequency tables or calculate t-values
> manually from weighted and unweighted mean and variance estimates. Any
> ideas on how to do it more easily? (using Stata 10.1)
> Best,
> Duru
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Stas Kolenikov, also found at
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