gen mysample = (age < 40) & (nobel_prize == 1) & (extrasensoryperception == 1)
...
reg ... if mysample
See also http://www.stata.com/support/faqs/data/trueorfalse.html
Nick
[email protected]
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of Shuaizhang
> Feng
> Sent: 06 October 2004 22:53
> To: [email protected]
> Subject: st: resticting the sample?
>
>
> Dear all:
>
> I want to restrict my sample first and then use the
> resticted sample in my regressions. Is there a compact
> way to do this.
>
> for example, I want to run regression on age<40. but I
> don't want to add "if age<40" for every regressions I
> do, as it would be too long ( I have a bunch of other
> stuffs). is there an alternative way to do this?
>
> Thanks a lot in advance.
>
> shuaizhang
>
>
>
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