Lords administrators

I wondered if the library fGarch one can use different  independent variables to 
an ARMA model. ie

Y ~ ARMA (1,1) + GARCH (1.1)

but I want

Y ~ x1 + x2 +  x3 + Garch (1.1)

with Y (GDP), x1  (inflation), x2 (S & P), x3 (employment).

 Thanks for the reply


      
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