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Re: st: Industry dummies - inflated standard errors

From   Maarten Buis <[email protected]>
To   [email protected]
Subject   Re: st: Industry dummies - inflated standard errors
Date   Mon, 9 Jul 2012 16:47:19 +0200

On Mon, Jul 9, 2012 at 4:38 PM, Seliger  Florian wrote:
> Using factor variables solves the problem.
> However, I don't understand why? What is the difference between using dummy_1-dummy_33 and i.dummy?

It could mean that you did not exclude the reference category from
dummy_1-dummy_33, or that you chose an unfortunate reference category,
or that you made an error while creating those indicator variables.

Hope this helps,

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