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Thanks,
Shelley
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Hello -
https://communities.sas.com/t5/Forecasting-and-Econometrics/What-is-the-mathematical-form-of-an-ARIMA-forecast/m-p/28736/highlight/true#M100 might be of interest.
Thanks,
Udo
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FYI, you can find some detailed concept descriptions in http://www2.sas.com/proceedings/sugi28/252-28.pdf and the relationship between stationary AR model and MA model in https://www.otexts.org/fpp/8/4.
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