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st: Violation of porportional hazard assumption in Cox duration model - consequences?


From   "Nils Braakmann" <nilsbraakmann@googlemail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Violation of porportional hazard assumption in Cox duration model - consequences?
Date   Mon, 17 Mar 2008 11:00:29 +0100

Dear all,

I am currently estimating a Cox proportional hazard model on duration
data. Unfortunately, tests indicate that the proportional hazard
assumption is violated for some variables. As these  are mere control
variables which are not of central interest, I ask myself whether
there are any consequences of this violation for the other parameters
(for which the proportional hazard assumption holds).

Any help on this issue would be greatly appreciated.
Best regards,
Nils
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