Is the group structure important in grouped functional time series?

Yang Yang, Han Lin Shang

Research output: Contribution to journalArticlepeer-review

Abstract

We study the importance of group structure in grouped functional time series. Due to the non-uniqueness of group structure, we investigate different disaggregation structures in grouped functional time series. We address a practical question on whether or not the group structure can affect forecast accuracy. Using a dynamic multivariate functional time series method, we consider joint modeling and forecasting multiple series. Illustrated by Japanese sub-national age-specific mortality rates from 1975 to 2016, we investigate one- to 15-step-ahead point and interval forecast accuracies for the two group structures.
Original languageEnglish
JournalJournal of Data Science
Early online date4 Jan 2022
DOIs
Publication statusE-pub ahead of print - 4 Jan 2022

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