Hierarchies in organisations and labour market competition

This paper studies the endogenous determination of hierarchies in firms. Firms can design a hierarchy with a continuum of ranks, one for each ability level. Nevertheless, in the market equilibrium, they choose to have only a finite number of ranks, so that in each rank there are workers of different abilities, who produce different output, and receive the same wage. It is also shown that an increase in the extent of labour market competition reduces the number of ranks in the hierarchy.