We investigate the equilibrium market sturcture in virtual platform duopoly (auctions or other market forms) that are prevalent in internet settings. We take full account of the complexity of network effects in such markets and determine optimal pricing strategies. We invstigate the welfare...

This paper investigates the alleged predatory behaviour in the UK quality newspaper industry in the 1990s using a horizontal differentiation model and industry data.

This paper looks at competition in the Telecommunications industry with non-linear tariffs and network based price discrimination. Allowing for asymmetric networks and non-cooperatively chosen access prices simultaneously allows to explicitly derive non-reciprocal equilibrium access price...

This paper provides a limit result for the provision of a public good in a mechanism design framework as the number of agents gets large. What distinguishes the public good investigated in this analysis is its direct provision technology which is commonplace in modern information technologies.

This paper investigates the effect of spillovers in a model of endogenous technical change resulting from learning or network effects on the existence of a lower bound to market concentration.

In standard models of spatial harvesting, the resource is distributed over the complete domain and the agent is able to control the harvesting activity everywhere. In some cases, it is more realistic to assume that the resource is located at a single point and that the agent is required to...

In standard models of spatial harvesting, the resource is distributed over the complete domain and the agent is able to control the harvesting activity everywhere all the time. In some cases though, it is more realistic to assume that the resource is located at a single point in space and that...

[Einführung ...] Mit der vorliegenden Studie werden überfachliche Kompetenzen mit Hilfe leitfadengestützter Interviews ermittelt. Dies ist ein erster Schritt zur Kompetenzmodellierung in diesem Bereich (Campion et al., 2011). Dazu wurden 25 Fachexperten, die zum größten Teil selbst im...

In this paper we investigate optimal harvesting of a renewable natural resource. While in the standard approach the resource is located at a single point in space we allow for the resource to be distributed over the plane. Consequently, an agent who exploits the resource has to travel from one...

In this paper we investigate optimal harvesting of a renewable natural resource. While in the standard approach the resource is located at a single point in space we allow for the resource to be distributed over the plane. Consequently, an agent who exploits the resource has to travel from one...