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st: RE: Aren't distinct factors from factor analysis or PCA orthogonal to each other?


From   "Verkuilen, Jay" <JVerkuilen@gc.cuny.edu>
To   statalist <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Aren't distinct factors from factor analysis or PCA orthogonal to each other?
Date   Mon, 17 Aug 2009 12:40:54 -0400

Before you go any further I think you have a big problem to consider: 100 variables on, say 200 countries means you have WAY more covariances (or correlations) than you have countries. This means your correlation matrix is singular. 

I'm wondering whether some judicious data reduction by sum score is in order first.

Jay

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