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Re: st:about the fixed-effects model

From   Maarten buis <>
Subject   Re: st:about the fixed-effects model
Date   Tue, 31 Aug 2010 11:10:11 +0000 (GMT)

--- On Tue, 31/8/10, Jing Zhou wrote:
> Thanks for your suggestion. I have checked my dataset
> showing there is no change of province for this variable. I
> am wondering whether it is because my dataset is an
> unbalanced panel?

I did not mean that the province changed, but that the firms
changed with respect to to which province they belong. If that 
is not the case than the time constant covariates  should drop 
out, and the fact that they don't indicates an error somewhere 
in your data. Balanced or unbalanced should not make a 

Hope this helps,

Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen


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