Nobuo OkishioBorn in 1927 and died in 2003; the late Professor Nobuo Okishio was an emeritus professor of economics of Kobe University, former president of the Japan Association of Economics and Econometrics (currently, the Japanese Economic Association), and a member of the Science Council of Japan. Professor Okishio was awarded the Nikkei Prize for Economics Books in 1977. Major journal articles included “Monopoly and the Rates of Profit” (Kobe University Economic Review, No.1, 1955, 71–88); “Technical Change and the Rate of Profit” (Kobe University Economic Review, No.7, 1961, 85–99); “A Mathematical Note on Marxian Theorems” (Weltwirtschaftliches Archiv, Vol.91, No.2, 1963, 287–297); “A Formal Proof of Marx’s Two Theorems” (Kobe University Economic Review, No.18, 1972, pp.1–6); and “Notes on Technical Progress and Capitalist Society” (Cambridge Journal of Economics, Vol.1, 1977, pp. 93–100). He is the author of Essays on political economy: collected papers (1993, P. Lang: Frankfurt am Main) and 13 books in Japanese, and edited Business cycles: theories and numerical simulation (1992 P. Lang: Frankfurt am Main) and 11 books in Japanese. Professor Okishio taught and conducted research at Kobe University (1950–1990) and Osaka University of Economics (1990–2000). His major contributions range from Marxian economics, which include Marxian Fundamental Theorem and the Okishio Theorem, Keynesian economics including Keynes’ aggregate supply function, and Harrod’s instability principle.