Summary of JOIE article by Kazuhiro S. Taniguchi, Faculty of Business and Commerce, Keio University, Tokyo. The full article is available on the JOIE website. This paper examines the core features of Masahiko Aoki’s Comparative Institutional Analysis (CIA) by tracing its methodological foundations and conceptualization of institutions within his intellectual trajectory. Aoki (1938–2015) dedicated his career…