>>> [email protected] 31/08/02 18:52:16 >>>
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. 
* Does this do what you want?
drop if Time > Event_Time
C.
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