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| From | mdenisa@yahoo.com |
| To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>, "\"statalist@hsphsun2.harvard.edu\"" <statalist@hsphsun2.harvard.edu> |
| Subject | Re: st: probit offset produces a coeff of -1 instead of 1 |
| Date | Sat, 17 Aug 2013 12:19:35 -0700 (PDT) |
RIGHT, MANY THANKS ! I don't think you want to include x1 as a regressor if you are also specifying it as the offset. It is like you are trying to enter the same variable twice. At 09:56 AM 8/17/2013, mdenisa@yahoo.com wrote: Hello everyone I am trying to estimate a probit model where I need to fix the effect of a variable to be equal to 1 (data was generated from autility function where the coefficient is 1 for that variable). I thought using the option offset is the way to go: probit y x1 x2 x3, offset(x1) However, the estimate of the coefficient for x1 is -1 (to be more precise, -.95 with a CI of -.9911481 to -.9251313). >Does anyone know what to make out of the unexpected sign? Many thanks in advance Denisa * * 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/ ------------------------------------------- Richard Williams, Notre Dame Dept of Sociology OFFICE: (574)631-6668, (574)631-6463 HOME: (574)289-5227 EMAIL: Richard.A.Williams.5@ND.Edu WWW: http://www.nd.edu/~rwilliam * * 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/