"Union-firm Bargaining as a Repeated Game and the Behaviour of Wages over the Business Cycle"

This paper studies a repeated game between a union and a firm in the presence of revenue fluctuations. The simple setup, mainly based on Schultz’s (1995) model, gives support to the idea that the existence of a long-term relationship may change the predictions of the static one-shot model of wage and employment determination in unionized labour markets. In particular, when revenue is fluctuating and the discount factor is moderate the players can commit themselves to some ‘second best’ strategies, rather than playing non-cooperative strategies. As a consequence of the enforcement problems a flat wage over the business cycle may arise. This analysis suggests that ‘second best’ strategies allowing for a pro-cyclical wage as well as for a counter-cyclical wage are feasible. However, when the discount factor decreases and approaches a certain threshold value the parties cannot do better than play a wage constant over the cycle. Moreover, the resulting wage varies less than the employment level, in accordance with the empirical evidence.