[R] Estimate hazard function from right-censored data only

Spencer Graves spencer.graves at pdf.com
Wed Nov 5 03:47:43 CET 2003

If you are willing to assume an exponential distribution, then you can 
get a one-sided confidence bound on the exponential parameter.  The 
likelihood is the probability of what you observe.  Write that down and 
figure it out.  I'm sorry I don't have time to say more right now, but 
I've done it in the past.  It works. 

hope this helps.  spencer graves

John Fox wrote:

> Dear Monica,
> I'm not sure what the muhaz function is (it's not in the survival 
> package), but regardless, unless I'm seriously mistaken, there's no 
> information to estimate the hazard function if you haven't observed 
> any events.
> I hope that this helps,
>  John
> At 08:10 PM 11/4/2003 -0500, Monica L. Parra Torrado wrote:
>> Dear All,
>> I would like to ask if it is possible to estimate a hazard function 
>> using the muhaz command when all the data is right-censored.  My data 
>> has information of the number of weeks people has been unemployed but 
>> all of them are unemployed at the date of the survey, that is, I 
>> cannot observed when the individuals leave the unemployment state.
>> I appreciate your help,
>> Best,
>> Monica L.
>> ______________________________________________
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> -----------------------------------------------------
> John Fox
> Department of Sociology
> McMaster University
> Hamilton, Ontario, Canada L8S 4M4
> email: jfox at mcmaster.ca
> phone: 905-525-9140x23604
> web: www.socsci.mcmaster.ca/jfox
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