Customer service is of significant concern to an airline passenger. The on‐time performance of an airline is one of the important indicators of customer service. Analyses whether there is any relationship between airline flight delays and the financial situation of an airline. Identifies...

Under stationarity, the heterogeneous stoahastic processes are the non-ergodic ones. We show that if a distributed lag is of finite order, then its coefficients are unconditional means of the underlying random coefficients. This result is applied to linear transformations of the process. The...