The using observations of ARIMA(1,1,0)(1,1,0)12:1983M3 to 1990M12.
The number of samples is 132. But the number of the using observations
depends on order of AR and MA(also SAR and SMA).
How can I make them the same for comparing AIC and BIC ?
smpl 1983:03 1990:12 (your longest common sample)
Or via the GUI, Sample->Set range...