<>
I agree with Martin. This is generically the same problem as we
discussed at some length in this thread:
http://www.hsph.harvard.edu/cgi-bin/lwgate/STATALIST/archives/statalist.0903/Author/article-1170.html
The original poster agreed that life was much simpler when the data
were in long format. This seems to be the same kind of data structure.
Kit Baum | Boston College Economics and DIW Berlin | http://ideas.repec.org/e/pba1.html
An Introduction to Stata Programming | http://www.stata-press.com/books/isp.html
An Introduction to Modern Econometrics Using Stata | http://www.stata-press.com/books/imeus.html
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