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Change point estimation for Gaussian time series data with copula-based Markov chain models

Author

Listed:
  • Li-Hsien Sun

    (National Central University)

  • Yu-Kai Wang

    (National Central University)

  • Lien-Hsi Liu

    (National Central University)

  • Takeshi Emura

    (Institute of Statistical Mathematics)

  • Chi-Yang Chiu

    (University of Tennessee Health Science Center)

Abstract

This paper proposes a method for change-point estimation, focusing on detecting structural shifts within time series data. Traditional maximum likelihood estimation (MLE) methods assume either independence or linear dependence via auto-regressive models. To address this limitation, the paper introduces copula-based Markov chain models, offering more flexible dependence modeling. These models treat a Gaussian time series as a Markov chain and utilize copula functions to handle serial dependence. The profile MLE procedure is then employed to estimate the change-point and other model parameters, with the Newton–Raphson algorithm facilitating numerical calculations for the estimators. The proposed approach is evaluated through simulations and real stock return data, considering two distinct periods: the 2008 financial crisis and the COVID-19 pandemic in 2020.

Suggested Citation

  • Li-Hsien Sun & Yu-Kai Wang & Lien-Hsi Liu & Takeshi Emura & Chi-Yang Chiu, 2025. "Change point estimation for Gaussian time series data with copula-based Markov chain models," Computational Statistics, Springer, vol. 40(3), pages 1541-1581, March.
    • Handle: RePEc:spr:compst:v:40:y:2025:i:3:d:10.1007_s00180-024-01541-x
    DOI: 10.1007/s00180-024-01541-x
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    References listed on IDEAS

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