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RE: st: Disentangle unobserved state effect

From   Maarten buis <>
Subject   RE: st: Disentangle unobserved state effect
Date   Fri, 3 Aug 2007 06:55:12 +0100 (BST)

--- Gao Liu <> wrote:
> I like the idea of adding important state-wide variables, although
> some may still argue that some state-wide effects may never be
> observed but have significant impacts.

For that case you can use the random effects model, as I suggested

Hope this helps,

Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

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