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| From | Maarten Buis <maartenlbuis@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: Omitted category interaction variables |
| Date | Mon, 4 Nov 2013 14:48:01 +0100 |
On Mon, Nov 4, 2013 at 2:18 PM, Estrella Gomez wrote: > Yes, but this is not what I want. Then it excludes the year 2006 in > the last set of dummies; i.year; but I want it to be excluded from > every interaction term (i.year#c.ldist; i.year#i.dhome and > i.year#i.dlang) You forget to include the main effects of ldist dhome and dlang. That is probably what is causing the problems, as in that case you don't want to exclude a reference category. If you include the main effects, then setting the baseline once will be enough. -- Maarten --------------------------------- Maarten L. Buis WZB Reichpietschufer 50 10785 Berlin Germany http://www.maartenbuis.nl --------------------------------- * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/