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Difference between AR1 and lagged variable coefficients

Posted: Fri Nov 17, 2017 3:19 pm
by ClaireO
Is the difference in coefficients on the lagged variable in the equations below the result of the solution algorithm? I think they should be exactly the same. I know the intercepts will differ. Thanks.

SMPL 1960 2017q3
equation test1.ls log(Qgdp) c ar(1)
equation test2.ls log(Qgdp) c log(Qgdp(-1))

Re: Difference between AR1 and lagged variable coefficients

Posted: Fri Nov 17, 2017 3:54 pm
by EViews Gareth
If you use CLS as the estimation method for ARIMA, then the coefficient on the AR term and the lagged dependent term will be the same. The coefficient on the constant will not.

If you use GLS or ML as the estimation method, all bets are off.

Re: Difference between AR1 and lagged variable coefficients

Posted: Mon Nov 20, 2017 10:57 am
by EViews Glenn
Further, the default AR estimation method is ML.