Hi Paty ,
you can do it
bys id: gen x=employ if _n==1
bys id: replace x=x[_n-1] if x==.
keep if x==2
drop x
Edgard abanto
--
Ministerio de Agricultura
(http://www.portalagrario.gob.pe)
---------- Original Message -----------
From: Patricia Vera Rojas <[email protected]>
To: [email protected]
Sent: Thu, 9 Jun 2005 05:40:14 +0200 (CEST)
Subject: st: Keeping observations
> Hello all,
>
> I have :
>
> id employ
> 1 2
> 2 1
> 3 2
> 3 2
> 4 2
> 4 1
> 5 1
> 5 2
> 6 1
> 6 1
>
> where id= subject identification and employ=1 if the person is employed and
> employ=2 if the person is unemployed. I want to keep in the data those
> subjects whose are unemployed in the first observation (employ=2) without
> losing their second observation if they are observed more than once, that is:
>
> id employ
> 1 2
> 3 2
> 3 2
> 4 2
> 4 1
>
> How can I do that?
> Thanks,
>
> Patricia
>
>
>
>
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