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Breusch-Godfrey after ARMA

Posted: Sat Feb 25, 2012 2:20 pm
by startz
If you run a pure ARMA model and then check the Breusch-Godfrey, what exactly is EViews doing?

Re: Breusch-Godfrey after ARMA

Posted: Wed Feb 29, 2012 10:58 am
by startz
bump?

Re: Breusch-Godfrey after ARMA

Posted: Wed Feb 29, 2012 11:38 am
by EViews Gareth

Code: Select all

create u 100 series y=nrnd ' ar equation eq01.ls y c ar(1) eq01.makeresid resid01 eq01.makegrad grad01 grad02 series g1=grad01/resid01/(-2) series g2=grad02/resid01/(-2) series resid011 = resid01(-1) series resid012 = resid01(-2) resid011=@recode(resid011=na, 0, resid011) resid012=@recode(resid012=na, 0, resid012) equation serial_ar.ls resid01 g1 g2 resid011 resid012 freeze(artab) eq01.auto(2) ' arma equation eq02.ls y c ar(1) ma(1) eq02.makeresid resid02 eq02.makegrad grad03 grad04 grad05 series g3=grad03/resid02/(-2) series g4=grad04/resid02/(-2) series g5=grad05/resid02/(-2) series resid021 = resid02(-1) series resid022 = resid02(-2) resid021=@recode(resid021=na, 0, resid021) resid022=@recode(resid022=na, 0, resid022) equation serial_arma.ls resid02 g3 g4 g5 resid021 resid022 freeze(armatab) eq02.auto(2) show serial_ar show artab show serial_arma show armatab

Re: Breusch-Godfrey after ARMA

Posted: Wed Feb 29, 2012 2:14 pm
by startz
Hadn't seen that one before!
Thanks.

Re: Breusch-Godfrey after ARMA

Posted: Tue May 22, 2012 3:39 am
by kiber_master
In such case the summary statistics of Breusch-Godfrey model will count intercept as another factor. I mean Adjusted R-squared and F-statistics, where k is the number of explanatories except intercept.