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st: AW: dropped groups in xtlogit fixed effects
From
"Martin Weiss" <[email protected]>
To
<[email protected]>
Subject
st: AW: dropped groups in xtlogit fixed effects
Date
Thu, 1 Apr 2010 15:18:03 +0200
<>
http://www.stata.com/statalist/archive/2009-10/msg01191.html
HTH
Martin
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Von: [email protected]
[mailto:[email protected]] Im Auftrag von
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Gesendet: Donnerstag, 1. April 2010 15:13
An: [email protected]
Betreff: st: dropped groups in xtlogit fixed effects
Dear Statalisters,
I want to use a logit regression on panel data with country fixed
effects, therefore I am using xtlogit with fe at the end.
However I am getting two notes that i do not fully understand.
1st, Multiple positive outcomes within groups encountered
2nd, x groups (x obs) dropped becasue of all positive or all negative
outcomes
can anybody explain what these mean and if they are a problem? It
almost halves my sample which may be a bit of an issue.
I must apologize for my stata ignorance, I am new a stata newby
Many thanks in advance for any help you may be able to offer,
Richard
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