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| From | Alfonso Sanchez-Penalver <alfonso.statalist@gmail.com> |
| To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
| Subject | Re: st: suregub |
| Date | Wed, 2 Apr 2014 13:27:29 -0400 |
Hi Meredith, I'm a bit confused here. Can you explain the reasoning behind the constraining of the sum of the response (dependent) variables to equal 1? It either does or not at each observation. Normally constraints in a regression are on the coefficients and/or parameters to be estimated, not on the variables themselves. So please can you expand a little on what the study is about and the equations you are using? Best, Alfonso Sanchez-Penalver > On Apr 2, 2014, at 11:43 AM, Meredith Her<meredithherd@yahoo.com> wrote: > > I am using Baum's written command -suregub- on an unbalanced panel dataset to estimate 5 regressions where each of my equations have the same explanatory variables. In addition, I would like to constrain my equations such that the 5 y dependent variables add up to 1.0. I have typed -constraint define 1 [y1] + [y2] + [y3] + [y4] [y5] = 1. But is this the correct syntax? > > * > * 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/ * * 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/