A PROCESS BASED ON STRATIFICATION FOR COX’S REGRESSION
MODEL
Abstract: A process based on stratification to check the proportional hazards assumption in
a general Cox’s regression model is considered. The stratification is based on a
nonrandom choice of strata for individuals together with a random one generated by the
behaviour of covariates at failure times. A formal description for the asymptotic
performance of the process is given and some statistical applications are established.
2000 AMS Mathematics Subject Classification: Primary: -; Secondary: -;
Key words and phrases: -