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| From | "Seliger Florian" <seliger@kof.ethz.ch> |
| To | "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu> |
| Subject | AW: st: Industry dummies - inflated standard errors |
| Date | Mon, 9 Jul 2012 15:00:15 +0000 |
It seems that I chose an unfortunate reference category. Thanks. -----Ursprüngliche Nachricht----- Von: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Maarten Buis Gesendet: Montag, 9. Juli 2012 16:47 An: statalist@hsphsun2.harvard.edu Betreff: Re: st: Industry dummies - inflated standard errors On Mon, Jul 9, 2012 at 4:38 PM, Seliger Florian wrote: > Using factor variables solves the problem. > However, I don't understand why? What is the difference between using dummy_1-dummy_33 and i.dummy? It could mean that you did not exclude the reference category from dummy_1-dummy_33, or that you chose an unfortunate reference category, or that you made an error while creating those indicator variables. Hope this helps, Maarten -------------------------- Maarten L. Buis Institut fuer Soziologie Universitaet Tuebingen Wilhelmstrasse 36 72074 Tuebingen Germany http://www.maartenbuis.nl -------------------------- * * 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/ * * 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/