Answer:
The income received by an individual who supplies labor services equals the incremental benefit generated to the firm by the individual´s labor
Explanation:
The marginal productivity theory of income or wages states: firms pay a salary that is equal to the extra benefit a (that is why is marginal; an extra unit in this case is an extra unit of labor) worker represents in output of production. In other words, if the firm employees a new worker, its salary would be equal to the extra output produced by him or her (marginal product of labor). Because of this, wages depend on the production function each firm has. The mathematical formula to get the marginal product of labor is: dF/dL, where F is the production function and L represent labor in it.