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From   Eva Gottschalk <e-gott.81@web.de>
To   Austin Nichols <austinnichols@gmail.com>, statalist@hsphsun2.harvard.ed=
Date   Wed, 21 Mar 2007 10:53:11 +0100

u
Subject: Re: st: svy commands for factor analysis
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Hi,

since my data is survey date, I use - svyset - but as far as I know there's=
  no svy-command for factor analysis? So how can I apply the survey settings=
  (in my case the weighting for overrepresentation of east-germany) to the e=
stimation of the factor analysis?

Really appreciate your help
EVa




> -----Urspr=FCngliche Nachricht-----
> Von: "Austin Nichols" <austinnichols@gmail.com>
> Gesendet: 19.03.07 17:34:46
> An: statalist@hsphsun2.harvard.edu
> Betreff: Re: st: tabulate with pweight


> Eva--
> I will assume you do in fact have a pweight on your data. While it is
> quite true that "use of pweights generally requires prior use of
> -svyset- and then -svy- commands" as Nick points out, note that
> specifying pweights as aweights produces identical point estimates, so
> *as long as you are not computing the variance* of estimates, for
> example to test whether proportions are equal or to compute confidence
> intervals, just:
> tab x y [aw=3Dweight]
> and you can see the two weight types side by side by trying:
> reg x y [aw=3Dweight]
> reg x y [pw=3Dweight]
> where only the Std.Errors and related quantities should differ.
>
> On 3/19/07, n j cox <n.j.cox@durham.ac.uk> wrote:
>> It is not clear to me that your situation is one leading
>> to the use of pweights.
>>
>> Either way, -tabulate- does not support pweights. That
>> is implied in the help, which explains that only the
>> other kinds of weight are supported.
>>
>> Use of pweights generally requires prior use of -svyset-
>> and then -svy- commands.
>>
>> Nick
>> n.j.cox@durham.ac.uk
>>
>> Eva Gottschalk <e-gott.81@web.de>
>>
>> I'm using data that is weighted for the overpresentation of east-germany
>> (weighting variable=3Dweight).
>>
>> For the regression I just add [pweight=3Ddweight] to weight my data.
>>
>> This command does not work with: tab x y [pweight=3Dweight]
>>
>> I don't understand why, because it seams quite important to wheight the
>> data for descriptions about germany as a whole.
>


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