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From |
nicola.baldini2@unibo.it |

To |
statalist@hsphsun2.harvard.edu |

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

Date |
Tue, 14 Aug 2007 19:57:35 +0200 |

Sorry for jumping in the discussion, but did you have a look at the correlation matrix before spending times on complicated tests, like those available through -coldiag2- and -collin-??? I obviously agree with Scott: don't include the dependent variable in the factor analysis. Also: which kind of variables do you have? While I used a factor analysis with constructs (e.g. perceptions on Likert scales), I would never use it with """real""" things (e.g. profits, patents, age, etc...), it is often too complicated to interpret the findings. P.S. Just to be sure: when you said "i stored the 4 factors as new variables", did you mean that you saved the factor scores with post-estimation command -predict-, right? Nicola At 02.33 14/08/2007 -0400, "georg wernicke" wrote: >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 * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: factor analysis - interpreting the results, inclusion of dp variable***From:*"georg wernicke" <georg.wernicke@googlemail.com>

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