[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

Re: st: stock sample duration model with no follow-up

From   Antoine Terracol <[email protected]>
To   [email protected]
Subject   Re: st: stock sample duration model with no follow-up
Date   Thu, 20 Dec 2007 17:47:40 +0100


I might have misunderstood your problem, but here are my two cents:

If you only have one observation per individual, I don't think you can estimate any duration model.

If the ongoing duration if t at the time of the survey, and you observe no exit and have no follow-up for any individual , the likelihood for each spell will be one, because it is the probability that the duration is greater than t, conditionnal on the duration being greater that t : Pr[T>t|T>t]=1

The conditionning part is the stock sampling correction.

If your survey contains a retrospective calendar, you might be able to construct complete spells and get a sample on which you can estimate something.


[email protected] wrote:

Dear statalister,
I have data on unemployment spells for all individuals who happen to be unemployed at the time of the survey. Thus, all observations are censored and I have no follow up.
how can I estimate this duration model in STATA?

thanks alot

* For searches and help try:

Ce message a ete verifie par MailScanner
pour des virus ou des polluriels et rien de
suspect n'a ete trouve.

*   For searches and help try:

© Copyright 1996–2024 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index