We analyze potential gains from hypothetical mergers in local public transport using the non-parametric Data Envelopment Analysis with bias corrections by means of bootstrapping. Our sample consists of 41 public transport companies from Germany's most densely populated region, North...

Germany's water supply industry is characterized by a multitude of utilities and widely diverging prices, possibly resulting from structural differences beyond the control of firms' management, but also from inefficiencies. In this article we use Data Envelopment Analysis and Stochastic Frontier...

For some commodities, the strong increase in demand over the last decade will have major impact on their future availability. Thus, the importance of assessing a commodity's criticality by means of criticality indicators continuously increases. In the literature, numerous indicators for...