Daisuke Kurisu, Yuta Okamoto and Taisuke Otsu

Published 24 November 2025

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Since the seminal work by Beresteanu and Molinari (2008), the random set theory and related inference methods have been widely applied in partially identified econometric models. Meanwhile, there is an emerging field in statistics for studying random objects in metric spaces, called metric statistics. This paper clarifies a relationship between two fundamental concepts in these literatures, the Aumann and Frechet means, and presents some applications of metric statistics to econometric problems involving random sets.