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st: RE: From: ?????? ???sta?t???? <firstname.lastname@example.org>
This is unanswerable even by experts. You should give
precise details please for anyone to be able to help.
> We are trying to use the system GMM command xtabond2 and we would
> appreciate if anyone who has used the command before could
> help us on the following:
> Despite being familiar with a theoretical basis of system
> GMM, and having
> used the differences-GMM, I am having difficulties with the
> command format for systems.
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