Dear All:
I know that some of you don't like comparisons between software and I apologize in advance. Unfortunately, I need to report a strange phenomenon.
When I run a factor analysis with Stata
factor var1 var2 ... varN, pcf mineigen(1)
rotate, varimax
and with SPSS (Analyze>Data reduction>Extraction: Principal components>Rotation: varimax),
in the Rotated Factor Loadings, I find that some factors have the same figures in Stata and SPSS, but with opposite signs. This does not happen for all factors but only some of them. The others are similar in both results.
Being a beginner, I would expect to find the same matrix with both software.
There is probably a logical explanation but I miss it.
Best regards
Herv� Stolowy
***********************************************************
Professeur/Professor
Coordinateur du D�partement/Head of Department
HEC Paris
D�partement Comptabilit� Contr�le de gestion / Dept of Accounting and Management Control
1, rue de la Liberation
78351 - Jouy-en-Josas
France
Tel: +33 1 39 67 94 42 - Fax: +33 1 39 67 70 86
[email protected]
http://campus.hec.fr/profs/stolowy/perso/home.htm
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