st: IV option in XTABONDS2

["P.Chakkrit" <ed034001@srv.cc.hit-u.ac.jp>]

Dear listers
I am currently running the XTABOND2 and still don't understand the
difference between GMM option and iv option. I have read HELP for XTABOND2
already but still cannot figure it out. I would be very appreciated any
suggestions. Thank you so much
P. Chakkrit 


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