HI,
What version of Stata are you using?
Cheers, Garry
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Dimitris
Pavlopoulos
Sent: Friday, July 04, 2008 5:36 PM
To: [email protected]
Subject: st: Cox model with shared frailty
Dear Statalisters,
I would like to ask for your help in running a cox model with shared
frailty on unemployment duration. I have organized my data in a spell
file with in total 7,401 spells. I tried a very simple version of the
model:
xi: stcox i.variable, shared(pid)
where pid is the person identification number and 'variable' has 4
categories.
The model has been running for the last 16 hours.
Some time ago, there were discussions in the statalist about it (see,
for example,
http://www.stata.com/statalist/archive/2004-01/msg00728.html). I
understand from these discussions that the cox model with frailty runs
extremely slow due to the exact calculation of the partial likelihood
from STATA. As these questions were posted a few years ago, my question
is whether there has been developed a way to speed up the process. Or
would the only way be to drop the cox model and try a parametric one?
Thank you in advance.
best,
Dimitris Pavlopoulos
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