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st: elapsed time between incidents


From   Steven Archambault <archstevej@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: elapsed time between incidents
Date   Tue, 19 Feb 2013 13:45:12 -0700

Hi all,

I have unbalanced panel data where an incident (measured by a non-zero
value) occurs randomly in the panel. I want to calculate the time
(days_elapsed) between incidents. Here is an example:

id day incident days_elapsed
1  1      6             .
1   2     .              .
1   3     .              .
1  4      .              .
1   5     8             4
1   6     .              .
1   7     5             2

Thanks for any help here.  I have not been able to find this.

-Steve
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