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Re: st: Excluding some cases for regression analysis

From   "Neil Shephard" <[email protected]>
To   [email protected]
Subject   Re: st: Excluding some cases for regression analysis
Date   Mon, 25 Jul 2005 12:05:21 +0100

> I have an unbalanced panel of more than 3000 firms. The firms have
> been assigned id from 1 to 3256. I was wonderting if i could exclude
> some firms (say id 45 to 560) when I run any regression. How could I
> do so? Best, Alice

-man regress- indicates that you can use the [ if exp ] statememnt, thus you can see the 
help for -man if- and -man operators- to construct a logical statement which will exclude 

Assuming you have a dependent variable y and an independent variable x with the 
variable id as described above...

regress y x if(id < 45 | id > 560)

You will also want to read the User Manual Chapters 14 and 16 if you haven't already.


Neil Shephard
Genetics Statistician
ARC Epidemiology Unit, University of Manchester
[email protected]
[email protected]

"If your result needs a statistician then you should design a better experiment" - 
Ernest Rutherford

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