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Re: st: Svy subsamples


From   Steven Joel Hirsch Samuels <sjhsamuels@earthlink.net>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Svy subsamples
Date   Wed, 21 Nov 2007 08:19:03 -0500

Richard, without more details I cannot be certain. However, if her purpose is analytic, namely to study relationships, do hypothesis tests, compute regressions, I'd say go ahead and subset the data. In fact, I'd suggest that you ignore the study weights, especially if they were post-stratified, but that is a different issue.

-Steven
On Nov 21, 2007, at 7:48 AM, Richard Williams wrote:


I know that when using the svy: prefix, you should use the subpop option when analyzing subsamples, rather than using if or dropping cases. However, I have a student who has this monstrous data set and she only wants to analyze a small subset of it. I'm afraid that if she has to keep all these unused cases in her file, her not- so-powerful computer is going to have problems.

Is there a legit way to extract only the cases you want? Is it all that horrible if you extract cases rather than use subpop?

Thanks for any info. And Happy Thanksgiving to all those who celebrate it.

-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
HOME: (574)289-5227
EMAIL: Richard.A.Williams.5@ND.Edu
WWW: http://www.nd.edu/~rwilliam

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Steven  Samuels

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