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Tewodaj Mogues <tmogues@students.wisc.edu> wrote that the 
-pre( ,lagstruct())- option causes -xtabond- to produce different 
results in
Stata 8 and Stata 9.


I suspect that Tewodaj is not using an up-to-date Stata 8 and that the
difference is due to the changes to -xtabond- that were part of the
14may2004 update to Stata 8.

I suggest that Tewodaj type

. update all

in his version of Stata 8.  

Since the 14may2004 update, no changes have been made to -xtabond-.

	- David
	  ddruker@stata.com
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