Im Sommer 2005 gab die Deutsche Telekom ihre Pläne für den Aufbau eines neuen Glasfasernetzes bekannt. Sie formulierte gleichzeitig die Bedingung, daß dieses Netz weder preislich noch hinsichtlich der Nutzung durch andere Anbieter (Netzzugang) reguliert werden sollte. Um die Investitionen zu...

This paper is motivated by the European Union strategy to secure competitiveness for Europe in the globalising world by focussing on technological supremacy (the Lisbon - agenda). Parallel to that, the EU Commission is trying to take a more economic approach to competition policy in general and...

Nach langer Ausschreibung und rechtlichen Auseinandersetzungen mit unterlegenen Anbietern unterzeichneten Vertreter der Bundesregierung und des Konsortiums Toll Collect am 20. September 2002 einen 17 000 Seiten umfassenden Vertrag. Darin war festgeschrieben, daß Toll Collect bis Ende August...

Kann sich Kultur selbst finanzieren? Nach den starken Einsparungen der Jahre 2003 und davor ist seit drei Jahren zwar wieder eine Tendenz der Ausgabenerhöhung des Bundes festzustellen (für 2008 ist auf Bundesebene ein Mehrbetrag von 1,3% für Kultur und Medien, das bedeutet Gesamtausgaben von...

The European Commission has intensively discussed the mandatory separation of natural gas transmission from production and services. However, economic theory is ambiguous on the price effects of vertical separation. In this paper, we empirically analyse the effect of ownership unbundling of...

The German Energiewende’s potential effects on the reliability of electricity supply as well as the corresponding economic consequences have recently entered both the political and scientific debate. However, empirical evidence of power outage costs in Germany is rather scarce. Following a...

Supervised dimension reduction methods have been extensively applied in different scientific fields like biology and medicine in recent years. However, they have hardly ever been used in micro economics, and in particular cost function modeling. Nonetheless, these methods can also be useful in...

In 2007, Germany changed network access regulation in the natural gas sector and introduced a so-called entry-exit system. The re-regulation’s spot market effects remain to be examined. We use cointegration analysis and a state space model with time-varying coefficients to study the...

We explore the hypothesis that export policies and trade patterns of national players in the steam coal market are consistent with non-competitive market behavior. We test this hypothesis by developing an equilibrium model which is able to model coal producing nations as strategic players. We...

Supply shocks in the global gas market might affect countries differently since the market is regionally interlinked but not perfectly integrated. Additionally, high supply side concentration might expose countries to market power in different ways. To evaluate the strategic position of...