st: Re: saving a sample after a regression

[Christer Thrane <lineea@broadpark.no>]

reg y x z
reg y x if e(sample)

Christer
----- Original Message ----- 
From: "william.miles" <william.miles@wichita.edu>
To: <statalist@hsphsun2.harvard.edu>
Sent: Monday, March 12, 2007 8:47 PM
Subject: st: saving a sample after a regression



> Hi-
> I am running regressions with several variables, and not all observations 
> have
> data on all variables.  I run a regression of Y on X, and use say 1,000
> observations.  Then I run a regression of Y on X and Z, and because not 
> all
> observations have Z, I only get a sample of 800 observations.  Is there 
> any
> way to save the sample from the latter regression, so I can then run the
> original regression of Y on only X, but using only the 800 observations 
> that
> include Z, without having to go throught the data by hand?
> Thanks,
> Bill
>
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