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Forecasting Process Details |
Missing Values |
When a missing value is encountered at time , the smoothed values are updated using the error-correction form of the smoothing equations with the one-step-ahead prediction error,
, set to zero. The missing value is estimated using the one-step-ahead prediction at time
, that is
(Aldrin 1989). The error-correction forms of each of the smoothing models are listed in the following sections.
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