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


From   Steven Samuels <sjsamuels@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Comparing weighted and unweighted distributions via Chi2 test
Date   Thu, 16 Jun 2011 06:33:19 -0400

To quote the FAQ: "Precise literature references please!"

Steve
On Jun 15, 2011, at 12:32 PM, Duru wrote:

Thank you all for your help. Further research revealed, as Steve put
it, standard significance tests (t-test, chi2) does not apply to the
evaluation of nonresponse weights since they are based on the same
sample, so it is good that Stata does not have this procedure! My
confusion was that some published work used this method previously.
In this case, I will rather calculate standardised bias for this
purpose (for those who are interested see Vehovar 2007; Kreuter et al,
2010).

Best,

Duru


On Thu, Jun 9, 2011 at 6:58 PM, Carlo Lazzaro <carlo.lazzaro@tin.it> wrote:
> Dear Duru,
> I have just downloaded Pfeffermann's paper mentioned by Stas at:
> 
> http://www.stat.iastate.edu/seminars/abstracts/seminars2006-2007/VIGRE_Surve
> y_16Apr07.pdf
> 
> Kindest Regards and thanks to Stas for quoting,
> Carlo
> -----Messaggio originale-----
> Da: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] Per conto di Stas Kolenikov
> Inviato: giovedì 9 giugno 2011 16.57
> A: statalist@hsphsun2.harvard.edu
> Oggetto: Re: st: Comparing weighted and unweighted distributions via Chi2
> test
> 
> If you kind find this paper, it will be quite useful:
> http://www.citeulike.org/user/ctacmo/article/1036965. 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
> it.
> 
> On Wed, Jun 8, 2011 at 4:05 PM, Duru <duru80@gmail.com> 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 http://stas.kolenikov.name
> Small print: I use this email account for mailing lists only.
> 
> *
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