Those familiar with the arima method may find it highly unusual for a series to be stationary, as was indicated in the code in my prior message. It is. When I copied my code I missed part of it. The corrected proc is as follows. It contains a first and fourth order difference.

PROC ARIMA; IDENTIFY VAR=Q1A20 (1,4) NLAG=24; ESTIMATE Q=(1)(4)(6);
FORECAST LEAD=60 ID=DATE INTERVAL=QUARTER OUT=ARIMOUT;

Stan

tek wrote:
Kattamuri.Sarma@RESPONSEINSURANCE.COM skrev i meldingen ...
>I don't know any internet sources for this. But SAS has atleast 3 books on
>SAS/ETS which has
> syntax for ARIMA, and Time Series in general.
>
> Hope this helps.
>
> - Kattamuri Sarma
Thanks for answering. Yes, I knew this. I haven't had a chance to look
at these books yet. I have seen the documentation that comes with
the installation of SAS 8.1, but I think these documentations are not
very good.
Terje Karlsen