Parameter Order

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Anja
Posts: 8
Joined: Tue Aug 12, 2008 10:44 am

Parameter Order

Unread post by Anja »

Hi everyone,
I'm fitting a bivariate garch-m model and found that when I change the order of the parameters in the model my results change!
So for example :
equation Aeq A
# constant A{1} hhs(1,1){1} hhs(2,2){1}
equation Beq B
# constant B{1} hhs(1,1){1} hhs(2,2){1}

gives a different results than:
equation Beq B
# constant B{1} hhs(2,2){1} hhs(1,2){1}

What would be the cause of this and what should I do to overcome this problem?

Thanks!
TomDoan
Posts: 7814
Joined: Wed Nov 01, 2006 4:36 pm

Re: Parameter Order

Unread post by TomDoan »

Anja wrote:Hi everyone,
I'm fitting a bivariate garch-m model and found that when I change the order of the parameters in the model my results change!
So for example :

Code: Select all

equation Aeq A
# constant A{1} hhs(1,1){1} hhs(2,2){1}
equation Beq B
# constant B{1} hhs(1,1){1} hhs(2,2){1}
gives a different results than:

Code: Select all

equation Beq B
# constant B{1} hhs(2,2){1} hhs(1,2){1}
What would be the cause of this and what should I do to overcome this problem?

Thanks!
You have a (1,2) in the second, and a (1,1) in the first.
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