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Re: st: [ST] question: anything to do if "origin" is interval censored?


From   Steven Samuels <sjsamuels@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: [ST] question: anything to do if "origin" is interval censored?
Date   Tue, 26 Oct 2010 08:57:55 -0400

--

I can think of only one approach: Determine for a random sample of subjects (possibly by asking them) approximately when they received the invitation; gather enough information on all subjects to develop a predictive model for this; and apply MI techniques. A Google search for '"interval censoring" "multiple imputation"' could be rewarding.

Steve

Steven J. Samuels
sjsamuels@gmail.com
18 Cantine's Island
Saugerties NY 12477
USA
Voice: 845-246-0774
Fax:    206-202-4783
On Oct 25, 2010, at 10:12 PM, László Sándor wrote:

Hi all,

I tried to check the following and have a feeling what to expect, I
still ask for your quick expert advice, which will be greatly
appreciated:

I am running an experiment where a subject becomes "at risk" once she
reads our invitation, but we only know when we sent her invitation and
the time she agreed to do what we asked (which clearly does not happen
upon receipt immediately). Is there anything I can do in this case for
Stata to be "robust" to this uncertainty?

I checked left censoring and truncation in the manuals, and I am also
uncertain how any method could deal with this kind of uncertainty in
the event time (also, uncensored "enter" time precedes censored
"origin"). Yet you might know something I missed, and I'm happy to
learn the prudent way to set things up (-stset-) in this case.

Thank you!

Laszlo


László Sándor
PhD candidate
Department of Economics
Harvard University

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