This paper explores the relationship between hubbing activities and flight delays in the United States from an airline-specific network perspective. Airline hubbing is measured with the Hubbing Concentration Index. We estimate the impact of hubbing behavior on delays, using three measures of...

With the increasing profit orientation of German airport operators the question as to weather they possess market power is gaining more importance. Whereas there have been some studies about the degree of market power of individual airports in countries as Australia and Great Britain, the German...

Woody biomass harvested from old-growth forests results in a significant “carbon debt” when used as a feedstock for transportation fuel. This is because previously stored forest carbon is released to the atmosphere as CO2. The debt is eventually repaid provided that the life cycle CO2...

We quantify energy return on energy investment (EROI) as one metric for the sustainability of alternative jet fuel production. Lifecycle energy requirements are calculated and subsequently used for calculating three EROI variants. EROI1 is defined as the ratio of energy in fuel output to...

This paper quantifies the technical efficiency of German public bus transport companies and discusses main factors influencing their performance, using a stochastic production frontier approach. We test for the efficiency impact of ownership structure, competitive tendering, and potential...

In this paper we investigate current pricing practices at the 200 biggest airports in the European Union. Our analysis shows that airport incentive programs are, in general, a common tool of airport pricing as they are used at one third of all airports. We also find evidence on the presence of...

In this paper we develop a model of hub competition, which includes duopolistic Bertrand competition on the downstream market in order to analyze the incentives of hub airports to exploit market power in the transfer passenger market. We find evidence that downstream competition limits hub...