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st: AW: RE: AW: Exclude some observations from a sample in a regression
From
"Martin Weiss" <[email protected]>
To
<[email protected]>
Subject
st: AW: RE: AW: Exclude some observations from a sample in a regression
Date
Wed, 7 Apr 2010 11:33:21 +0200
<>
"-if foreign- would also include any missings on -foreign-"
True, though the example was carefully chosen not to run into the problem...
"rep78" would be an entirely different beast in this respect...
HTH
Martin
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von Nick Cox
Gesendet: Mittwoch, 7. April 2010 11:29
An: [email protected]
Betreff: st: RE: AW: Exclude some observations from a sample in a regression
But be careful.
-if foreign- would also include any missings on -foreign-.
-if foreign != 1- would do that too.
Nick
[email protected]
Martin Weiss
In the case of a binary variable, you could use the shortcuts
sysuse auto, clear
regress price weight length if foreign
regress price weight length if !foreign
to include all foreign (first case) or domestic (second case) cars.
Claude Francoeur
Doing a regression, I would like to exclude a series of observations
that are identified with a binary variable (=1). Could you let me know
what the syntax would be, if it's doable?
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