death_date birth_place school_tradition influences color contributions nationality field birth_date article_title name
13 november 2003 hyōgo-ku , kobe marxian economics karl marx red okishio 's theorem japanese political economy 2 january 1927 nobuo okishio
 nobuo okishio
nobuo okishio

okishio studied mathematical economics under kazuo mizutani .
in 1950 he graduated from kobe university and later taught there .
he soon began to doubt the premises and results of modern economics , and decided to search for alternatives by studying marxian economics .
okishio worked to clarify the logic of karl marx 's economic system , offering formal and mathematical proofs for many marxian theorems .
for example , in 1955 , he gave the world 's first proof of the `` marxian fundamental theorem '' , as it was later named by michio morishima , which is the theory that the exploitation of surplus labor is the necessary condition for the existence of positive profit .
concerning marx 's falling rate of profit , okishio considered that his famous theorem would not deny it .
okishio wrote many papers covering various important fields in modern and marxian economics , for example value and price , accumulation theory , critical analysis of keynesian economics , trade cycle theory and on the long run tendency of capitalistic economy .
they were published in over twenty books and two hundred papers , almost all in japanese .
about thirty of his published papers have been translated in english , and much of these materials are collected in the book -lrb- nobuo okishio , michael kruger and peter flaschel , 1993 -rrb- .
