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st: Drop observations of groups with 0 as critical value
From
"Achmed Aldai" <[email protected]>
To
[email protected]
Subject
st: Drop observations of groups with 0 as critical value
Date
Sat, 04 Jun 2011 16:17:54 +0200
Hi
Below find an extract of my data set.
gvkey debtratio
1001 0,2
1001 0,23
1001 0,23
1001 0,23
1001 0,25
1200 0,05
1200 0
1200 0
1200 0
I want to drop all the firms that have a zero debtratio. Meaning that once the debtratio becomes 0 I want to drop all the observations of this company (gvkey). So in the end I should only be left with firms that all have a nonzero debtratio.
Thank you
Felix
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