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Bayesian mortality modelling with pandemics: a vanishing jump approach

Author

Listed:
  • Goes, Julius

    (University of Bamberg)

  • Barigou, Karim

    (Université catholique de Louvain, LIDAM/ISBA, Belgium)

  • Leucht, Anne

    (University of Bamberg)

Abstract

This paper extends the Lee–Carter (LC) model for single- and multi-populations to account for pandemic jump effects of vanishing kind, allowing for a more comprehensive and accurate representation of mortality rates during a pandemic, characterized by a high impact at the beginning and gradually vanishing effects over subsequent periods. While the LC model is effective in capturing mortality trends, it may not always be able to account for large, unexpected jumps in mortality rates caused by pandemics or wars. Existing models allow either for transient jumps with an effect of one period only or persistent jumps. However, there is no literature on estimating mortality time series with jumps having an effect over a small number of periods, as is typically observed in pandemics. The Bayesian approach allows to quantify the uncertainty around the parameter estimates. Empirical data from the COVID-19 pandemic show the superiority of the proposed approach, compared with models with a transitory shock effect.

Suggested Citation

  • Goes, Julius & Barigou, Karim & Leucht, Anne, 2025. "Bayesian mortality modelling with pandemics: a vanishing jump approach," LIDAM Reprints ISBA 2025008, Université catholique de Louvain, Institute of Statistics, Biostatistics and Actuarial Sciences (ISBA).
    • Handle: RePEc:aiz:louvar:2025008
    DOI: https://doi.org/10.1093/jrsssc/qlaf018
    Note: In: Journal of the Royal Statistical Society. Series C: Applied Statistics, 2025
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    Cited by:

    1. Julius Goes & Henriette Engelhardt, 2026. "Probabilistic population forecasts for small regions," Demographic Research, Max Planck Institute for Demographic Research, Rostock, Germany, vol. 54(23), pages 719-762.

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