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| From | K Jensen <k.x.jensen@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: Question about interactions |
| Date | Thu, 7 Mar 2013 11:03:10 +0000 |
Thanks for the replies I received on interactions. They were very helpful and I think that I understand the model now. Say we are looking at the interactions of two variables. A colleague wondered why we don't just fit the possible group combinations as indicator variables (i.e. 1-1 as a group (baseline), 1-2, 1-3, 1-4, 2-1, 2-2, 2-3, 2-4, etc) and get an OR (I am doing logisitic regression) for each group combination except 1-1 . What is the advantage of fitting the conventional model? Thankyou Karin * * 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/