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Linn said
I've tried and it really doesn't matter...
I get the same result.
And that result will presumably be meaningless, as a statement like
if shift == 1
will ever only reference the FIRST observation of the variable shift.
Given what you have outlined as the logic, I cannot imagine that this
could be useful. Please see my proposed solution.
Kit Baum, Boston College Economics and DIW Berlin
http://ideas.repec.org/e/pba1.html
An Introduction to Modern Econometrics Using Stata:
http://www.stata-press.com/books/imeus.html
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