While preference modelling is becoming one of the pillars of machine learning, the problem of preference explanation remains challenging and underexplored. In this paper, we propose \textsc{Pref-SHAP}, a Shapley value-based model explanation framework for pairwise comparison data. We derive the appropriate value functions for preference models and further extend the framework to model and explain \emph{context specific} information, such as the surface type in a tennis game. To demonstrate the utility of \textsc{Pref-SHAP}, we apply our method to a variety of synthetic and real-world datasets and show that richer and more insightful explanations can be obtained over the baseline.
@article{arxiv.2205.13662,
title = {Explaining Preferences with Shapley Values},
author = {Robert Hu and Siu Lun Chau and Jaime Ferrando Huertas and Dino Sejdinovic},
journal= {arXiv preprint arXiv:2205.13662},
year = {2022}
}