[R] How to fit GARCH(1,1) with targeted unconditional variance?
unixunix99 at gmail.com
Sat Feb 14 21:24:55 CET 2009
I have a univariate data set, and the unconditional variance is 1. I would
like to fit a GARCH(1,1) model to the data set with a constraint: \omega
(the constant parameter in GARCH(1,1)) is equal to 1-\alpha-\beta. So the
unconditional variance can be controled to be \omega /(1-\alpha-\beta) = 1.
I was using garchFit (fGARCH package) but did not find the way to control.
Thanks a lot!!
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