st: Endogenous option on the predetermined variables in xtabond extimations

["Monica L. Parra Torrado" <mparrat@bu.edu>]

Dear Statalist members,

I am trying to estimate xtabond including some predetermined variables but
when I include the option "endogenous" it does not recognize such command.
Does anyone know how should I specify it? 
Here is an example of the estimation with (that works) and without the
endogenous option (that does not work) :

xtabond ratleft inflation , pre(cumrpdrless cumrbgdrrgtns , lag(1,.))
lags(2) robust small ;

xtabond ratleft inflation , pre(cumrpdrless cumrbgdrrgtns , lag(1,.)
endogenous) lags(2) robust small ;


Thanks for your help.

Best, 

Monica L.

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