In perfectly competitive markets, the factor price is equal to the marginal product of that factor, i.e. the amount of revenue gained by a small increase in quantity of factor used. So the price of labour, the real wage, is equal to the marginal product of labour, or the amount of output that an extra unit of labour will result in. | In perfectly competitive markets, the factor price is equal to the marginal product of that factor, i.e. the amount of revenue gained by a small increase in quantity of factor used. So the price of labour, the real wage, is equal to the marginal product of labour, or the amount of output that an extra unit of labour will result in. |