Unverified50% confidenceFactExact time
Classical hierarchical time series forecasting is expressed with a summing constraint matrix S: the aggregate-level values of the bottom-level series y_t can be written as S y_t, and consistency requires the forecasts to lie in the column space of S.
1
Sources
50%
Confidence
Long-term
Relevance
10/14/2026
First Seen
Sources
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