The X-means clustering method indicates five business patterns among regional banks. This also characterizes respective clusters and demonstrates that medium-sized banks actively develop security investments, which increases overseas business’s contributions to profits. Meanwhile, small banks cannot expand overseas investments, which differ from other banks. These banks must seek other business models to compensate for this decline in their earning power.
Yamaguchi, M. (2018), "Is Japanese Regional Banks’ Overseas Business in Emerging Markets Hopeful?: An Observation through X-means Clustering", Banking and Finance Issues in Emerging Markets (International Symposia in Economic Theory and Econometrics, Vol. 25), Emerald Publishing Limited, pp. 193-214. https://doi.org/10.1108/S1571-038620180000025009Download as .RIS
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