Hello - Even if you are not using PROC ARIMA for estimation, you may want to check out http://support.sas.com/documentation/cdl/en/etsug/63939/HTML/default/viewer.htm#etsug_arima_sect015.htm and http://support.sas.com/documentation/cdl/en/etsug/63939/HTML/default/viewer.htm#etsug_arima_sect042.htm for some ideas. Thanks, Udo
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