After deregulation in the US in 1978, air carrier networks were increasingly focused around a small number of hubs. These ‘hub-and-spoke’ (HS) networks were the predominant form of network organisation of large carriers as well as smaller regional and commuter carriers. The...

In this paper we present some nonparametric bootstrap methods to construct distribution-free confidence intervals for inequality indices belonging to the Gini family. These methods have a coverage accuracy better than that obtained with the asymptotic distribution of their natural estimators,...