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

[Monica L. Parra Torrado]

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.