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st: shifting values one period ahead


From   asb stata <asb.stata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: shifting values one period ahead
Date   Wed, 22 Sep 2010 19:13:22 -0400

I am facing a tricky coding issue that involves creating 'newvar1'
from 'var1' given 'id' and 'start'. The variable 'newvar1' is obtained
by shifting 'var1' one period ahead within each 'id'.

id	start	var1	newvar1

1	1	1	0
1	0	1	1
1	0	0	1
1	0	0	0

2	0	0	0
2	0	0	0
2	1	1	0
2	0	0	1
2	0	1	0

3	0	0	0
3	0	0	0
3	1	1	0
3	0	1	1
3	0	1	1
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