Event history analysis: generate an event variable

[Jean Ndenzako]

I have data on the date entreprises have been created and the date at which the same entreprises have formally registered.
I want to create two variables: a duration variable and an event ( registered or not- binary 1/0) variable.

I generated the duration variable as follows:

duration=date2 - date1

How can I generate the event variable?

Is the duration variable correctly generated?

ID	Date of creation=date1	Date of registration=date2
1	2003	2003
2	1990	1994
3	1978	1978
4	1954	1955
5	2001	2001
6	1990	1995
7	2005	2010

Thank you

Jean

[Carlo Lazzaro]

Jean:
as far as I can get your data excerpt, there's no need to create an event variable, as all your -id- get registered sooner or later.
The duration variable is correct (I assume that you want to highlight the time elapsed from enteprise creation to its registration.

[Jean Ndenzako]

Thank you Carlo. Your answer prevents me from pursuing a false route. One last question: If I fix a cut off date, let us say the year 2003. Would it be possible to generate an event variable since certain variables would be right censored. Kindly advise.

[Carlo Lazzaro]

Jean:
yes you can.
If you set a cut-off date, you will have right-censored data.
I think that you could benefit from taking a look at the -st- entries in Stata .pdf manual.

[Jean Ndenzako]

Thank you. I will