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Re: st: subpop() and over() with survey mean estimation using SDR weights


From   Sam Schulhofer-Wohl <sschulh1.work@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: subpop() and over() with survey mean estimation using SDR weights
Date   Wed, 1 Feb 2012 09:19:17 -0600

Jeff,

Got it. Thank you again for the followup.

Sam


On Tue, Jan 31, 2012 at 9:52 AM, Jeff Pitblado, StataCorp LP
<jpitblado@stata.com> wrote:

> Sam Schulhofer-Wohl <sschulh1.work@gmail.com> had a follow-up question:
> > Is -svy bootstrap- with -bsn(4)- equivalent to SDR weights in all cases?
> > For example, if I am using the IPUMS version of the Current Population
> > Survey with
> >
> > svyset [iw=wtsupp], sdrweight(repwtp1-repwtp160) vce(sdr)
> >
> > can I instead do
> >
> > svyset [iw=wtsupp], bsrweight(repwtp1-repwtp160) bsn(4) vce(bootstrap)
> >
> > (Comparing the formulas on pages 186 and 190 of [SVY] suggests that the two
> > settings are indeed always equivalent, but official confirmation would be
> > nice.)
> While the replicate weights are different between the two methods, the formula
> used to compute the VCE from the replicated parameter estimates is equivalent
> between the SDR method and the bootstrap with a multiplier of 4.
> - --Jeff
> jpitblado@stata.com



--
Sam Schulhofer-Wohl
Senior Economist
Research Department
Federal Reserve Bank of Minneapolis
90 Hennepin Ave.
Minneapolis MN 55480-0291
(612) 204-5484
wohls@minneapolisfed.org

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