Hi,
I am using coxph with weights to represent sampling fraction of subjects.
Our simulation results show that the robust SE of beta systematically
under-estimate the empirical SD of beta.
Does anyone know how the robust SE are estimated in coxph using weights?
Is there any analytical formula for the âweightedâ robust SE?
Any help is appreciated!
Thanks so much in advance
Willy
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
