It has been observed that university professors sometimes become less research active in their mature years. This paper models the decision to become inactive as a utility maximising problem under conditions of uncertainty and derives an age-dependent inactivity condition for the level of...

We model a firm’s choice as to the age composition of dismissed workers for different assumptions about the level of firing costs. We find that when the cost of firing is independent of age, a higher level of firing costs will induce firms to fire their younger workers while lower costs induce...

We extend the efficiency wage model of Shapiro and Stiglitz to account for the observation that workers’ effort has a tendency to fall when they approach the end of their employment contract. In particular, we find that the efficiency wage increases when the end of term approaches for a given...