Koji Okuguchi Department of Economics,Gifu Shotoku Gakuen University   Nakauzura Gifu-shi, Gifu-ken 500-8288 Japan   okuguchi@gifu.shotoku.ac.jp     Biographical Sketch: Born 1935.Graduated from Hitotsubashi University,Tokyo ,Japan .Ph.D from the same university. Graduate Study at University of Rochester(all expense Fulbrighter) and University of Cambridge(British Council scholar). Visitor at University of New South Wales,Australian National University,National Taiwan University,University of Bonn,University of Munich,Budapest University of Economics,Bilkent University(Turkey). Papers in Review of Economic Studies,Economica,International Economic Review,Journal of Economic Theory,Public Choice, etc. Author(joint with F.Szidarovszky) of The Theory of Oligopoly with Multi-Product Firms,Springer-Verlag,1st ed,1990,2nd enlarged,revised ed.1999.Ediorial member of Journal of Economics,Guest editor,Managerial and Decision Economics. Professor emeritus,Tokyo Metropolitan University.Professor,Gifu Shotoku Gakuen University,Japan   Primary Research Focus: Theory of oligopoly and its applications   JEL Areas: