st: Xtabond Robust

["Fausto Araujo" <ytcfausto@hotmail.com>]

Hi...

I have a problem with xtabond, Sargan test. Any model was not acceptable 
because Sargan test. I saw Xtabond robust. In this command don�t have a 
sargan estimative. When can I use xtabond robust? Is wrong I use xtabond 
robust in my case? If is wrong, what can I use(have other command which 
would better)?

Thanks

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