		
Dear Sir/Madam,

My name is Sharon Mazurel and I'm busy with my final thesis about
estimating the probability of the success or withdrawal of a merger or
acquisition.

For my model I also use duration analysis and found after doing some
research that the coxph function in R is very useful.

My question is:

In the Surv object you have two arguments, "time" and "event". I have
two events, namely withdrawn and success. 

Does coxph function calculate the coefficients correctly when you put no
"event" argument into the Surv object?

Thus:

Coxph(Surv(duration)~covariates,data=data) duration=duration of the deal



Best regards,


Sharon Mazurel

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