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The efficiency and productivity of Japanese securities firms, 1988-93
Fukuyama, Hirofumi, (1999)
Profit inefficiency of Japanese securities firm
Fukuyama, Hirofumi, (2008)
A Mergers and Acquisitions Index in Data Envelopment Analysis: An Application to Japanese Shinkin Banks in Kyushu
Färe, Rolf, (2010)