It works!!! thanks a lot
-----Message d'origine-----
From: Nick Cox
Sent: Tuesday, January 15, 2013 3:12 AM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: dropping panels with missing values
One way
. help egen
Use -rownonmiss()- across variables; then -total()- by panels.
egen mpresent = rownonmiss(y x1 x2 x3 x4)
egen npresent = total(mpresent == 5), by(panelid)
keep if npresent == 24
Nick
On Tue, Jan 15, 2013 at 1:55 AM, Zied Ouelhazi <ouelhazizied@gmail.com>
wrote:
I am working on panel data (N=204, Ti = 1985...2008)
I would like to identify and keep panels which have the same time spell
(on
a set of dependent variables and key covariates).
How could I proceed on Stata 12
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