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...

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...

Transaction costs will reduce the attractiveness of the Kyoto Mechanisms compared to domestic abatement options. Especially the project-based mechanisms CDM and JI are likely to entail considerable costs of baseline development, verification and certification. The AIJ pilot phase and the PCF...

Zertifikatemärkte für grünen Strom (erneuerbare Energien) und CO2-Emissionen wurden bisher in der Literatur überwiegend isoliert betrachtet. Wir analysieren für den Elektrizitätssektor die Implikationen eines Zusammenwirkens (Koexistenz) beider Märkte. Es werden zwei Fälle der Koexistenz...

The authors suggest a multi-layered system of three convergence criteria – similar to those used in the run-up to the European monetary union – that define the notion of ?demonstrable progress? towards reaching the emission commitments under the Kyoto Protocol. These are the existence of an...