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AW: st: Saving svy mean estimates?


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   AW: st: Saving svy mean estimates?
Date   Wed, 8 Apr 2009 09:58:36 +0200

<> 

The weird thing about the solutions in this thread is that they do not
conform to Rebecca`s request to get means accounting for survey weights the
same way -egen, mean()- does for non-weighted data: as a vector over all
observations in the dataset. The easiest solution that I can see is to
employ -svy: regress- and -predict-.

*************
webuse highschool, clear
svyset county [pweight=sampwgt], strata(state) vce(linearized)

// use -regress- to get means
svy linearized: regress weight sex
//see whether adjust matches -mean- results
adjust, by(sex) xb se
//get predictions
predict pred if sex==1, xb
predict female if sex==2, xb
replace pred=female if pred==.
drop female
// get ses
predict se if sex==1, stdp
predict sefemale if sex==2, stdp
replace se=sefemale if se==.
drop sefemale
l sex pred se in 1/10
//compare to -mean-
svy: mean weight, over(sex)
*************



HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Kanter, Rebecca
Gesendet: Mittwoch, 8. April 2009 02:31
An: statalist@hsphsun2.harvard.edu
Betreff: RE: st: Saving svy mean estimates?

Joao,
Thanks for your response; that helps a bit. But what I'm trying to get at is
how to store the e(b) (i.e. mean values) into a variable [the same way as if
I did egen newvar=mean(var), without acct for svy design]. Do you or someone
else know how to do this?
Many thanks,
Rebecca
___________________________________________
Rebecca M. Kanter
PhD Candidate
Johns Hopkins Bloomberg School of Public Health
Department of International Health
Center for Human Nutrition
________________________________________
From: owner-statalist@hsphsun2.harvard.edu
[owner-statalist@hsphsun2.harvard.edu] On Behalf Of Joao Ricardo F. Lima
[jricardofl@gmail.com]
Sent: Tuesday, April 07, 2009 7:13 PM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: Saving svy mean estimates?

Rebecca,

the svy mean estimates are saved in e(b)

*********begin example*************
webuse highschool, clear
svyset county [pweight=sampwgt], strata(state) vce(linearized)
svy: mean weight, over(sex)
eret li
mat li e(b)
*********end example*************

Sorry but I didn´t understand the second part of your question.

HTH,

Joao Lima

2009/4/7 Kanter, Rebecca <rkanter@jhsph.edu>:
> Hi,
>
> I am using the svy mean command to calculate survey weighted
state-specific mean estimates of different Mexican state characteristics,
for example the percent of the population in a specific Mexican state that
is indigenous
>
> Thus, I use the following command line: svy: mean indigena, over(state)
>
> And want to save these mean estimates (by state) as I would if I did an by
state, sort: egen mean(indigena)--that was not accounting for the survey
design; so my question is, how do I save the mean estimates by state from
the above svy command line: svy: mean indigena, over(ent)??  And/or how do i
save mean estimates for this that does take the svy pweight into account in
the proper manner (if I can't do it with svy: mean)? [I want to then drop
people from my dataset but want to have all the state estimates of
characteristics saved as variables before doing so].
>
> Thanks,
> Rebecca
>
>
> ___________________________________________
> Rebecca M. Kanter
> PhD Candidate
> Johns Hopkins Bloomberg School of Public Health
> Department of International Health
> Center for Human Nutrition
>
> *
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> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
>



--
----------------------------------------
Joao Ricardo Lima, D.Sc.
Professor
UFPB-CCA-DCFS
Fone: +5538387264913
Skype: joao_ricardo_lima
----------------------------------------

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