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Re: st: Picking Groups with Complete Data on Variable X


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Picking Groups with Complete Data on Variable X
Date   Sat, 10 Dec 2011 21:12:22 +0000

drop if missing(X)
bysort id_number : drop if _N < T + 1

Nick

On Sat, Dec 10, 2011 at 6:09 PM, micdepo mic <micdepo@gmail.com> wrote:

> I would like to extract from a panel dataset only the individuals that
> have complete data on a variable X.
>
> Say I start with:
>
>  egen group = group(id_number)
>
>
> Then, I would like to keep only the groups that have nonempty values
> on variable X for all years t=0 to t=T.

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