st: survival analysis

[marco.aboav@mail.polimi.it]

Dear Statalist
I am performing a survival analysis with a cox proportional hazards  
model with time-varying covariates.

I have 3 years data set but, because of lagged indipendent variables,  
actually I have 2 years data set and I need to match a indipendent  
variable (default=1) at time t with indipendente variables at time t-1  
(financial ratios), is there any fast procedure to handle it in stata  
instead of preparing the data set on excel?
(I already know I have to reshape my cross-section 2 years data set)

Moreover do you believe is very unusual to perform a survival analysis  
on just 2 years? In my case I have just a right censored problem.

Thanks
Marco

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