st: data suppression in Stata

[Rajiv Sinha <rajiv.sinha@asu.edu>]

Title: Blank

I have a very large panel data set that looks as follows:  people tracked over time and data on occurance of an event and a lot of time varying covariates (not shown below).

Person       Time          Event Time       X

1                    1                      2                1

1                    2                       2                3

1                    3                       2                20

2                    1                       1                5

2                    2                       1                 6

2                    3                        1                9

etc...

I need to suppress these data as follows:  since the event occured for person 1 at time 2 I want to drop all data pertaining to him for period 3 and keep data only for period 1 and 2.  Similarly for person 2, since the event occured at time 1, I want to drop all data after this point and keep data only for period 1.  The final data should be:

Person       Time          Event Time       X

1                    1                      2                   1

1                    2                       2                 3

2                    1                       1                   5

How do I do this in Stata?   Thanks in advance.