> 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
individuals.
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.
HTH's
Neil
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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