There are various exceptions to marginal productivity theory, particularly in the case of labor markets. [[Compensating differentials]], [[efficiency wages]], and [[employer discrimination]] all represent examples of situations in which this theory alone is not sufficient to account for the manner in which workers are paid. | There are various exceptions to marginal productivity theory, particularly in the case of labor markets. [[Compensating differentials]], [[efficiency wages]], and [[employer discrimination]] all represent examples of situations in which this theory alone is not sufficient to account for the manner in which workers are paid. |