Variable Capital
Constant capital contrasts with variable capital, v, the cost incurred in hiring labor power. Marx argues that only living labour creates new value. The higher value of output, compared to input costs, is (other things being equal) attributable to the exploitation of living labor-power only. Variable capital is "variable" because its value changes (varies) within the production process. Although most commentaries on Marx do not acknowledge this, these changes could be both positive or negative. A misapplication of labour, or the devaluation of types of labour activity by the market can mean the loss of part of the capital invested, or all of it. However, Marx does generally assume that labour will accomplish the valorisation of capital.
Read more about this topic: Constant Capital
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