A Practical Guide on Graphical Model Validation

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While the statistical tools (Bregman losses, Gini scores) are general, the context is strictly actuarial/insurance pricing. The concept of exposure-weighted measures is specific to insurance contracts with varying durations, which has limited direct analogy to standard trading assets unless modeling holding periods as exposures.

The mathematical formalization is rigorous, but the implementation of the graphical tools and metrics (especially the exposure-weighted versions) requires careful handling of weights and binning strategies. The paper provides code for LightGBM but not for the full validation suite.

The paper provides detailed mathematical formulations, a stylized example with explicit parameters, and code snippets for LightGBM. It references a public dataset (French MTPL) and a website for cleaned data.