Shocking gift exchange

We study how a gift exchange labor market reacts to the occurrence of negative shocks. One-round shocks may hit either workers’ wages or employers’ earnings (via worker productivity). In our model, other-regarding preferences suffice to predict gift exchange and wages above the competitive level. Wage rigidity is predicted if we add wage illusion and loss aversion. Using a real-effort laboratory experiment, we find support for the model. When there are no shocks, there is gift exchange. After a wage shock we see strong nominal wage rigidity and no impact on workers’ effort, as predicted. Rigidity is also observed after a productivity shock, but here we do observe increases in effort, especially at low wages. The latter is contrary to the model predictions and suggests that productivity shocks alter gift-exchange patterns. We conclude that the wage rigidity often observed in the field can be explained by boundedly rational workers with social preferences.