is the pure time delay (lag) for the effect of the ith predictor time series, X i,t B k i = X i,t-k i p i is the simple order of the denominator for the ith predictor time series q i is the simple ...

The Time Series Forecasting system uses the ARIMA procedure of SAS/ETS software to fit and forecast ARIMA models. The maximum likelihood method is used for parameter estimation. Refer to Chapter 7, ...