We develop a test for vertical collusion between airports and airlines in the case of two different scenarios. In the first scenario there is one airport and one airline; this intends to depict the case of airports that do not compete with any other one. In the second, we consider two competing...

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 from 2005...