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RE: st: Testing for attrition bias using the BGLW test
From
Julia Vaillant <[email protected]>
To
"[email protected]" <[email protected]>
Subject
RE: st: Testing for attrition bias using the BGLW test
Date
Wed, 25 Aug 2010 12:27:17 +0000
Thank you very much for your answer. I understand this is one way to implement this test, but as I said in the first post this method (regressing the DV on all covariates + attrition dummy + interactions of attrition dummy and covariates) will give the difference between the coefficients of the attritors and non-attritors.
I am interested in comparing the coefficients of non-attritors with the entire baseline sample (attritors+non-attritors). The goal is to see whether the non-attritors are representative of the full population or not.
I think this is what Becketti et al. do in their paper where they present the test, but that other papers have used the "interactions" method (I think it's all correct, but it's just not interpreted the same way).
Thank you,
Julia
-----Message d'origine-----
De : [email protected] [mailto:[email protected]] De la part de Scott Merryman
Envoyé : mercredi 25 août 2010 14:02
À : [email protected]
Objet : Re: st: Testing for attrition bias using the BGLW test
The paper:
http://www.chronicpoverty.org/uploads/publication_files/CPRC%20TOOLKIT%20NOTE%20ON%20ATTRITION-revfinal.pdf
has Stata code on pages 6 and 7 for BGLW test. Also a do-file is available at:
http://www.chronicpoverty.org/page/toolbox-analysing-data
Scott
On Wed, Aug 25, 2010 at 4:58 AM, Julia Vaillant <[email protected]> wrote:
> Dear Statalist,
>
> I would like to run a BGLW test (Becketti, Gould, Lillard & Welch, 1988, « The Panel study of income dynamics after fourteen years, an evaluation", Journal ef Labor economics, 6:472-92) on my data but I can't figure out how exactly to do it.
>
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