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| From | "Sun, Yan (IFPRI)" <Y.SUN@cgiar.org> |
| To | <statalist@hsphsun2.harvard.edu> |
| Subject | st: coding of factor variables |
| Date | Sat, 4 Jun 2011 17:03:30 -0400 |
Hi, Part I, when I have three groups, I create dummies for group1 and group2 (treating group3 as a base): My equation is reg y x z group1 group2 I want to calculate: predict xb, xb gen xbb1=xb-_b[group1]*group1-_b[group2]*group2 Part II, when I have 400 groups now My equation now is: xi: reg y x z i.group Predict xb, xb How do I calculate xbb1? Could I write xbb1=xb-b[i.group]*i.group? Since My problem is that I am not able write all of these 400 groups in the code. Thank you very much. Yan Sun IFPRI * * 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/