One-Shot Individual Claims Reserving

TL;DR

This paper advances individual claims reserving by developing a new, flexible methodology based on the classical chain-ladder approach, aiming to establish a practical standard for micro-level reserving in actuarial science.

Contribution

It introduces a novel one-shot individual claims reserving method building on the chain-ladder model, addressing current limitations in flexibility and robustness.

Findings

Stimulated active discussion in the actuarial community

Proposed methodology shows promise for practical implementation

Aims to set a new standard for micro-level reserving

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.