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Re: st: FW: Running Polychoric Principal Component Analysis in STATA


From   Abekah Nkrumah <ankrumah@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: FW: Running Polychoric Principal Component Analysis in STATA
Date   Wed, 22 Aug 2012 15:18:34 +0100

Dear Hilda,

I have used the polychoric PCA command by Stas you can download it
from SSC and it has an adequate help file which you can read. As far
as I know you do not need to recode the data into dummies (see the
paper publish by Stas Kolenikov and Angels in the Journal of Income
and Wealth). It should be possible for you to go ahead and run the PCA
with the variables on an ordinal scale. Hope this helps

Regards

On Wed, Aug 22, 2012 at 2:59 PM, Essendi H. <H.Essendi@soton.ac.uk> wrote:
> Dear STATA,
>
> How can I run Polychoric principal component analysis in STATA? . I have likert scale data on wellbeing and I would like to prepare wealth quintiles based on these subjective responses. The challenge I am facing however is how to prepar e my variables before running this. I am not sure whether I need to recode them into dummy variables or just rung these with all the ordered category?.  Also kindly advice on how to do this step by step.
>
> Many thanks,
> Hildah
>
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