http://www.sowi.uni-mannheim.de/lehrstuehle/lessm/veranst/Panelanalyse.pdf
The link above provides a good basic and largely math-free introduction that might be of help in explaining the logic of the answer already given.
________________________________
From: [email protected] on behalf of Steffen H. Gr�ning
Sent: Mon 8/14/2006 3:39 PM
To: [email protected]
Subject: st: Xtreg is dropping dummy variable for OECD countries.
Hi everybody,
When running a regression on my panel data for per capita growth, i
would like to include a dummy variable for the OECD Countries. Once
using a fixed effects model however, it is dropped.
May be it is just too late to work, but could somebody point out why
Stata does that?
Any pointer appreciated.
Thanks.
Steffen.
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