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One-Shot Individual Claims Reserving

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  • Ronald Richman
  • Mario V. Wuthrich

Abstract

Individual claims reserving has not yet become established in actuarial practice. We attribute this to the absence of a satisfactory methodology: existing approaches tend to be either overly complex or insufficiently flexible and robust for practical use. Building on the classical chain-ladder (CL) method, we introduced a new perspective on individual claims reserving in Richman and W\"uthrich [arXiv:2602.15385]. This manuscript has sparked considerable discussion within the actuarial community. The aim of the present paper is to continue and deepen that discussion, with the ultimate goal of advancing toward a new standard for micro-level reserving.

Suggested Citation

  • Ronald Richman & Mario V. Wuthrich, 2026. "One-Shot Individual Claims Reserving," Papers 2603.11660, arXiv.org.
    • Handle: RePEc:arx:papers:2603.11660
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    File URL: http://arxiv.org/pdf/2603.11660
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    References listed on IDEAS

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    1. Mack, Thomas, 1993. "Distribution-free Calculation of the Standard Error of Chain Ladder Reserve Estimates," ASTIN Bulletin, Cambridge University Press, vol. 23(2), pages 213-225, November.
    2. Mack, Thomas, 1991. "A Simple Parametric Model for Rating Automobile Insurance or Estimating IBNR Claims Reserves," ASTIN Bulletin, Cambridge University Press, vol. 21(1), pages 93-109, April.
    3. Ronald Richman & Mario V. Wuthrich, 2026. "From Chain-Ladder to Individual Claims Reserving," Papers 2602.15385, arXiv.org, revised Feb 2026.
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