Strong hysteresis in the labour market (see Cross, 1995) requires workers to be heterogeneous in terms of the cost of hiring and firing. We show how such heterogeneity arises naturally in labour markets due to differences in workers’ age by showing that both the hiring and the firing...

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...