Die Netzstrukturen im Bereich der Telekommunikation entwickeln sich weiter und erfordern neue Investitionen. Die notwendige Regulierung kann dabei verschiedene Formen annehmen und zu unterschiedlichen Zeitpunkten ansetzen. Die Autoren beschreiben die Netzinfrastruktur in Deutschland und zeigen...

This paper investigates firms’ incentives to innovate in Next Generation Access Networks. The market is initially asymmetric because one firm owns an "old" technology. This operator or its competitor may invest in a new access network. We focus on regulation of the old technology and show that...

This paper analyzes the role of different contract types and access regulation on innovation and competition in telecommunications in the context of Next Generation Access Networks. Within a standard duopoly model, it is shown that ex-post access contracts lead less often to the duplication of...

Contractual and regulatory provisions for access affect incentives to invest in an upgraded network and, in particular, a next-generation access network. Investment decisions are made under uncertainty and have to be made over time. This papers provides a framework for taking uncertainty, risk...

We analyze a model of monopolistic price discrimination where only some consumers are originally sufficiently informed about their preferences, e.g., about their future demand for a utility such as electricity or telecommunication. When more consumers become informed, we show that this benefits...

This Paper analyses the impact of retail mergers on product variety. We show that a merging firm may want to enhance its buyer power vis a vis suppliers by delisting products and committing to a ‘single-sourcing’ purchasing strategy. Anticipating this, suppliers will strategically choose to...