Comparative advantage and the welfare effects of uniform wage policies

This paper analyzes the theoretical impact of a commonly cited union goal — the elimination or reduction of wage differentials within occupations. By dropping the usual assumption of homogeneous labor, we show how, and under what market conditions, workers will receive rents due to individual comparative advantage. In competitive labor markets a union-imposed uniform wage may lower the earnings of workers holding a productive advantage, causing a reduction in employment and a welfare loss of comparative advantage rents. The implications of a strict uniform wage rule imply that unions may be forced to adapt their wage policy to allow more productive workers to receive wage differentials. This consideration helps explain some common trade union institutions.