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Re: st: svy subpop option and e(sample)
From
Richard Williams <[email protected]>
To
[email protected]
Subject
Re: st: svy subpop option and e(sample)
Date
Wed, 25 May 2011 15:19:35 -0500
At 02:03 PM 5/25/2011, Steven Samuels wrote:
--
I have to agree with Stas. While the standard errors from
subsetting and from using -subpop()- might be indistinguishable, it
is not a given. My example was simplistic: there were no strata, and
clusters were independent of the subpopulation, weight, and analysis variables.
Another, potentially more serious, problem for subpopulation
analysis is not, I believe, mentioned in the SJ article: bias can
arise if the supplied weights, appropriate for the whole sample, are
wrong for the subpopulation. Levy & Lemeshow (2008, p.148) give a
simple example.
Thanks to both you and Stas. Just so I am clear, would this be a
problem even if using the subpop option, or only if using an extract?
-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
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EMAIL: [email protected]
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