The English Economist David Ricardo Had Already Articulated the "Labor Theory of Value, " Asserting That All Value Is Produced by Human Labor. How Does Marx Explain It?

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Marx explains the workings of this theory in great detail and with much greater consistency than Ricardo had done. But Marx also distinguished between "labor" and "labor power." "Labor" refers to the "socially necessary labor" and it transforms commodities into forms that can be exchanged. What the capitalist pays the worker for is not the "labor" that he adds to a commodity. He pays for the worker's "laboring power" for a set period of time. If the owner of capital (the means of production) paid directly for labor, exploitation would not be possible. The cost of maintaining labor-power is different than labor-power's expenditure in work. The first determines labor's exchange-value, the second determines its use-value. Marx discusses that the distinction between "labor" and "labor power" is only source of "surplus value." The capitalist benefits from this distinction. He pays the value of one day's labor, and therefore he has it for the day. As an instance, sustenance for the laborer only costs a half-day's labor. Here, the value of one day's labor- power is half a day's labor, and the capitalist can pay the worker at that value. The other half-day's labor exceeds the value of labor-power, and so this is surplus-value. Thus, the value the work created is double what the capitalist pays for. The capitalist paid full value for all of the commodities he used, and then he consumed their use-value. The asymmetry between the use-value and exchange-value of labor helps the capitalist to make a profit. The amount of labor needed to provide subsistence does not always equal the length of the work-day. The time in excess of the necessary labor time is surplus labor. Thus, the working day is a variable quantity which is depend on the amount of surplus labor. It can only vary within limits. There is no real minimum limit; there must be some surplus labor. It can approach but

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