CONTINUITY AND THE "RATE OF RETURN".

The article focuses on the concept of continuity and the rate of return. An economist describes the rate of return with the rate of profit at a switch point. With the same wage rate, net profit per man is higher, therefore the cost of capital equalizes the rate of profit. A more schematic treatment of continuity would allow to say that yet small, the difference between two adjacent wage-rates, there is always one method that is eligible to both, with the suitable pair of rates of profit and patterns of prices. A variation in wage rate brings a different set of prices into play. The difference between these two concepts arises from the difference in the arguments in which they occur. The one-commodity economy was devised to allow the neo-classical allegory in which the rate of profit equates to the marginal product of capital.