Date:         Fri, 12 Aug 2005 17:41:32 +0200
Reply-To:     Frank Thomas <news.ftr@free.fr>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         Frank Thomas <news.ftr@free.fr>
Subject:      Re: weighting with two weight variables
In-Reply-To:  <5BE841EFFAB9664A9E057D5217856A6B03168DCC@bubsex02.cen.csin.cz>
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Jan and Mr N Forcheh,
I intend to do regression analysis for all European countries together.
So, if I understand you well, I should only use the design weight (which
I did in my previous analyses).  However, this provides a queer result:
the 80 mill. of Germans will have the same weight as the several
millions of, say, Austrians. This is why there is the population weight.
So, ... ?

Frank


Spousta Jan wrote:

>A remark: If weghting with the compound weight, all confidence intervals
>and statistical tests are biased. So use this method only for computing
>the mean scores (e.g. a mean trust of an European respondent in the
>European Parliament). If comparing the countries (ANOVA-like), it is
>appropriate to use the design weight only.
>Jan
>
>-----Original Message-----
>From: Spousta Jan
>Sent: Friday, August 12, 2005 4:35 PM
>To: SPSSX-L@LISTSERV.UGA.EDU
>Subject: RE: weighting with two weight variables
>
>Hi Frank,
>
>multiply them:
>
>compute wgt = w_design * w_country.
>
>and weight by the compound weight wgt.
>
>Greetings
>
>Jan
>
>-----Original Message-----
>From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of
>Frank Thomas
>Sent: Friday, August 12, 2005 4:24 PM
>To: SPSSX-L@LISTSERV.UGA.EDU
>Subject: weighting with two weight variables
>
>Hi,
>I am doing regression analysis with the European Social Survey data set.
>
>The data need weighting. There are two weights:
>- a design weight to correct for within-country deviation from the
>population, and
>- a population weight for correcting for country size when you do an
>analysis for all countries together. Thus, the population weight
>neutralizes the fact that you have a similar sample size in all
>countries. When doing an analysis with all countries together the
>population sizes have to be used to take the different sizes of the
>population into account.
>
>If doing analysis on the complete data set both weights have to be
>combined. How to do this ? The weight command only allows for a single
>variable.
>
>
>Thanks for your help.
>
>F. Thomas
>
>--
>..........................................
>Dr. Frank Thomas
>FTR Internet Research
>93110 Rosny-sous-Bois
>France
>
>
>
>


--
..........................................
Dr. Frank Thomas
FTR Internet Research
93110 Rosny-sous-Bois
France