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Re: st: panel data: drop a whole group/identifier
From
Nick Cox <[email protected]>
To
[email protected]
Subject
Re: st: panel data: drop a whole group/identifier
Date
Wed, 17 Aug 2011 16:03:17 +0100
No; you can do this under the aegis of -by:- so long as you feed it
the right information.
gen isbad = year == 2006 & something_bad_is_true
bysort panelid (isbad) : drop if isbad[_N]
See also
SJ-11-2 dm0055 . . . . . . . . . . . . . . Speaking Stata: Compared with ...
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox
Q2/11 SJ 11(2):305--314 (no commands)
reviews techniques for relating values to values in other
observations
On Wed, Aug 17, 2011 at 3:54 PM, Sabrina Helmut <[email protected]> wrote:
> I sorted my panel data by year (2004-2006) and identifier. Now, I want to drop the identifier for the whole panel (2004-2006) if a certain condition let's say for one of the years (2006) is not fulfilled. What is the correct command for dropping whole groups (characterised by a specific identifier)? I already tried the "by" command but think that this doesn't help to drop a whole group. "By" would only drop the year where the condition is not fulfilled and the remaining identifier-year observations are kept. Am I right?
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