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Re: AW: st: interpretation of FE model with interaction of 2 dummies with continuous variable


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: AW: st: interpretation of FE model with interaction of 2 dummies with continuous variable
Date   Fri, 17 Jul 2009 15:18:23 +0000 (GMT)

--- On Thu, 16/7/09, P K  wrote:
> How could I interpret the interaction of 2 continuous
> variables and 2 dummies, ie
> 
> strategic_change*ceo_change*duration_change*turnover
> (with turnover and duration_change being continuous
> variables, while strategic_change and  ceo_change are
> dummies).

the change in the effect of duration due to a unit 
change in turnover when there has been a strategic 
change and a ceo change.

I would have to have very good theoretical reasons
to introduce a four-way interaction though, because:

a) interactions eat huge amounts of power (i.e. you
are less likely to find a significant effect when
you should, or you need really really large datasets 
to estimate these models), and

b) they are a nightmare to explain to your audience.

Hope this helps,
Maarten
-----------------------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://home.fsw.vu.nl/m.buis/
-----------------------------------------





      

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