--- Kevin Daley <[email protected]> wrote:
> Am I breaking some basic rule of statistics, however, by using an
> interactive term derived from a different specification of the
> variable (time) than the main effect included in the model?
No
> Some researchers adjust for non-proportionality using an interaction
> based on a continuous specification of time (or the log of time) when
> its main effect was categorized, so it seems that the reverse would
> be just as reasonable (an interaction derived from a categorized
> effect of time while the main effect was modeled as a continuous
> variable).
Sounds fine to me
-- Maarten
-----------------------------------------
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
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
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