In chapter I, we model monopolistic competition in the spirit of Blanchard and Kiyotaki (1987) and we study the implications of this market structure for the existence of dynamically inefficient equilibria. We show that, with free entry, the presence of some pure profit does not rule out dynamic...

We analyze the air transportation vertical channel and show the existence of an asymmetric distribution of profit margins between airlines and the firms operating in upstream stages. Higher margins are observed for leasing companies, engine manufacturers and GDS, while airlines exhibit a very...

We investigate how the intensity of competition among airports affects their technical efficiency by computing airports’ markets on the basis of a potential demand approach. We find that the intensity of competition has a negative impact on airports’ efficiency in Italy during the...