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st: stset: I can't get rid of a probable error

From   Martin Neugebauer <[email protected]>
To   [email protected]
Subject   st: stset: I can't get rid of a probable error
Date   Fri, 28 Jan 2005 16:39:58 +0100

Hopefully somebody can help me out with this:

I am trying to estimate the average marriage time until divorce. When I run the stset command, I always get the following "probable error":

id: respid
failure event: failed == 1
obs. time interval: (date0, date1]
exit on or before: failure
t for analysis: (time-origin)
origin: time date0
if: partnr==minpart

7277 total obs.
10 overlapping records (date1[_n-1]>date0) PROBABLE ERROR
468 ignored per request (if(), etc.)
6799 obs. remaining, representing
6799 subjects
1067 failures in single failure-per-subject data
116093.5 total analysis time at risk, at risk from t = 0
earliest observed entry t = 0
last observed exit t = 49

What does Stata mean by "overlapping records (date1[_n-1]>date0)"? How can I solve the probable error?


gen failed=1
replace failed=0 if JScheidung==.
replace failed=9 if JSterbe <=2000
gen date0= J_Heirat
gen date1= JScheidung
replace date1= 2000 if JScheidung==.
replace date1= JSterbe if JSterbe<=2000
drop if date0==.
drop if date1==.
replace date1=date1+ .5 if date1==date0
sort respid partnr
by respid (partnr): gen minpart=partnr[1]
stset date1, id(respid) time0(date0) origin (time date0) failure (failed==1) if(partnr==minpart)

Thank you!
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