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Re: st: probit offset produces a coeff of -1 instead of 1


From   [email protected]
To   "[email protected]" <[email protected]>, "\"[email protected]\"" <[email protected]>
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, [email protected] 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 *
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