Are efficiency wages equality wages? Exogenously induced fairness norms in working environments

We investigate how the introduction of a salient norm for pay differentiation influences wage offers and effort exertion in a gift exchange experiment. Exogenously induced claims indeed lead to substantial differentiation in wages. At the same time, unequal wage schemes do not crowd out effort exertion. In particular, we do not observe strong detrimental effects resulting from disadvantageous relative wage positions. Finally, we find that specific communication patterns have a significant impact on effort exertion.