Pla-López, Rafael, "Study by System Dynamics of the Problem of the Equalization of the Gain Rate", 1986
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We study the problem of the adequation of the market prices to some "production prices" with which an intersectorial equalization of the gain rate was obtained in an ideal capitalism of free competition. We criticize the treatment of this problem by Marx, Sweezy and Salama-Valier, by its static or aprioristic character. And we propose a system of dynamic regulation utilizing the intersectorial coefficients of an input-output table and supposing full mobility of the capital. The study of this system permits to conclude that the equilibrium values of the gain middle rate and of the production prices depend exclusively of the intersectorial coefficients of the directly or indirectly productive sectors. From this, we study the evolution of the market prices. of the production prices, of the capital organic composition, of the gain sectorial rates and of the gain middle rate from a modification of these coefficients in an equilibrium situation.