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Re: An error using maximize function

Posted: Sat Oct 08, 2016 8:34 am
by TomDoan
This is covered in Section 4.15 of the User's Guide. You can't start in 1975:1 because there are no lags for u and h. (You also have to make sure that your guess values allow the function to be computed).

Re: An error using maximize function

Posted: Sun Oct 09, 2016 8:23 am
by TomDoan
Is there any significant "GARCH" effect in that data? There usually is at best a weak GARCH effect in quarterly data, and if there is no GARCH, there is no "M" effect.