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st: factor analysis - interpreting the results, inclusion of dp variable


From   "georg wernicke" <georg.wernicke@googlemail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: factor analysis - interpreting the results, inclusion of dp variable
Date   Mon, 13 Aug 2007 15:49:40 +0100

hello stata list,

i have a probably rather simple questions to which i cannot find good
links in the net.

i have quite a number of independent variables which have been
identified as significant in the literature before (around 16). when i
add all them in a regression, not one single variable is significant.
i want to employ factor analysis to get a persimonious model.

here are my questions:
 1. do i include the dependent  variable in the equation? (fac
dependent  independent1..... etc.)
2. the analysis is retains 4 factors and gives me a factor loading
table which i rotated. now what do i do with the rotated table? i
stored the 4 factors as new variables..do i simply ass them in the
regression equation or do i only run a regression with these factors
now?
3. or does the result of 4 retained factors tell me that my model
should consist of 4 independent variables only?

sorry, i know some of the questions are probably quite blunt...but
still, i am lost on what to do with the results..

thanks

george
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