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RE: Re: st: Residuals in Panel Data regression
From
DE SOUZA Eric <[email protected]>
To
"[email protected]" <[email protected]>
Subject
RE: Re: st: Residuals in Panel Data regression
Date
Tue, 24 Apr 2012 16:58:18 +0200
Kit,
FE treats the unobserved time invariant component as random and, therefor, requires strict exogeneity, which means that the lagged dependent variable is ruled out as a regressor.
OLS with dummies (constants) only requires contemporaneous exogeneity and can include the lagged dependent variable as a regressor.
Eric
Eric de Souza
College of Europe
Brugge (Bruges), Belgium
http://www.coleurope.eu
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Christopher Baum
Sent: 24 April 2012 15:42
To: [email protected]
Subject: Re: Re: st: Residuals in Panel Data regression
<>
On Apr 24, 2012, at 2:33 AM, DD wrote:
> The key question here is: do the conditions/asumptions (regarding
> error
> process) differ between OLS and FE??
They surely do not, because the FE estimator is conceptually just OLS with dummy variables for each unit in the panel.
However the meaning of 'robust' VCE changes, in that it should now be cluster-robust by panel unit, rather than standard White/sandwich estimator, as [xt] xtreg describes.
Kit
Kit Baum | Boston College Economics & DIW Berlin | http://ideas.repec.org/e/pba1.html
An Introduction to Stata Programming | http://www.stata-press.com/books/isp.html
An Introduction to Modern Econometrics Using Stata | http://www.stata-press.com/books/imeus.html
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