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Re: st: counting the time of being in a specific state


From   Edwin Leuven <e.leuven@uva.nl>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: counting the time of being in a specific state
Date   Fri, 3 Sep 2004 14:27:12 +0200 (CEST)

 id  state  year  count
101   4     1994   1
101   4     1995   2
101   4     1996   3
101   3     1997   1
102   1     1994   1
102   1     1995   2
102   2     1996   1
102   3     1997   1
103   4     1994   1
103   2     1995   1
103   4     1996   1

bysort id state (year): g count = _n
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