PROFIT,SURPLUS PRODUCT,EXPLOITATION AND LESS THAN MAXIMIZED UTILITY: A NEW EQUIVALENCE PROPOSITION ON THE FUNDAMENTAL MARXIAN THEOREM

Morishima's Generalized Fundamental Marxian Theorem (GFMT) is an extended form of Okishio's Fundamental Marxian Theorem, which showed the equivalence between positive profit and the exploitation of labor. GFMT is not developed as a system of equivalence proposition between five conditions, which I call ‘The Strong System of Exploitation Theory’. But by the definition of this system, there remains the possibility of positive profit without exploitation. In this paper, I demonstrated an alternative system of equivalence proposition, naming it ‘The Weak System of Exploitation Theory’, in which positive profits always mean exploitation. Here I introduced workers' utility function to define the exploitation concept. Then I could also show that the exploitation is equivalent with the situation where workers' utilities are under‐maximized.