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Re: st: Re: Poststratification weights


From   "Michael I. Lichter" <mlichter@buffalo.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: Poststratification weights
Date   Wed, 26 Nov 2008 13:27:21 -0500

Sorry for any confusion. Any answers to the original question??? Thanks. -ml

Martin Weiss wrote:
Just out of curiosity: What do "RTFM" and "FWIW" stand for? Should we have a repository of "frequently used abbreviations" in the list FAQ?

HTH
Martin
_______________________
----- Original Message ----- From: "Michael I. Lichter" <mlichter@buffalo.edu>
To: <statalist@hsphsun2.harvard.edu>
Sent: Wednesday, November 26, 2008 6:38 PM
Subject: st: Poststratification weights


In the Stata svy commands, what is the difference between creating your own poststratification weight (e.g. using -survwgt-) and treating it as a pweight (through -svyset [pw=x], strata(y)-) vs. telling Stata (through -svyset, poststrata(y) postweight(z)-) that you have a postratification variable and cell count? This shouldn't affect point estimates, but how does Stata treat the two differently with respect to variance calculations or anything else? Thanks. (I would RTFM if I had access to one, and I didn't find a FAQ or any discussion on the topic. I am using Stata 9.2, FWIW.)

Michael
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--
Michael I. Lichter, Ph.D.
Research Assistant Professor & NRSA Fellow
UB Department of Family Medicine / Primary Care Research Institute
UB Clinical Center, 462 Grider Street, Buffalo, NY 14215
Office: CC 125 / Phone: 716-898-4751 / E-Mail: mlichter@buffalo.edu

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