Re: st: Regression Constrained to other variable

[Oliver Jones <ojones@wiwi.uni-bielefeld.de>]

Hi,

you can first -preserve- your data and then keep just the observations that
meet your restrictions, i.e. -drop if x6 == 1 & (x1 == 0 | x1 == .)-

Best
Oliver



Am 05.05.2011 15:24, schrieb vikramfinavker:
> Hi,
>
> can some one please advise me how can i run a regression which is
> constrained to other variable.
>
> e.g. i am trying to run following regression.
> y = ∝ + βx1+ βx2+βx3+bx5 +ui which is constrained to variable x6
>
> my data for x1 and x6 are like this;
>
> x1              x6
> 123423        1
> 134343        1
> 234234        0
> 555454        1
> 664543        0
> 767677        0
> 0                0
> .                 0
> 0                1
> .                 1
> 12323        0
>
> now i want to tell stata that is should use all observations of x1 where its
> grater than zero (x1>0) and select observations from 0&  missing (.) if x6
> is 0.
>   so i want stata to select following observations
>
> x1              x6
> 123423        1
> 134343        1
> 234234        0
> 555454        1
> 664543        0
> 767677        0
> 0                0
> .                 0
> 12323        0
>
> If its my question is not clear, please let me know.
>
> thanks a lot.
>
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