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| From | Anders Alexandersson <andersalex@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: factormat STATA 10 |
| Date | Tue, 21 Sep 2010 12:08:53 -0400 |
I would think that 4 observations are too few for factor analysis regardless of the size of the underlying matrix. What would be a meaningful result of factor analysis with 4 observations? Maybe you instead want to use a 4*4 matrix with 88 observations, that is, with option n(88)? Anders andersalex@gmail.com On Mon, Sep 20, 2010 at 12:22 PM, <baxa0002@umn.edu> wrote: This is regarding factormat. I have an 88 by 88 co-variance matrix. In the > n(#) I input n(4) as I have a panel of 88 firms and 4 years. I get the error > message about too few observations. > > Is there anything I can do to get STATA to perform the factor analysis? If > not, can someone point out exactly where STATA fails (e.g. is there a matrix > that it cannot invert) so that I can figure a way around it. I went to the > Stata 10 manual and it did not have any formulas for factor mat. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/