In some markets vertically integrated firms sell directly to final customers but also to independent downstream firms with whom they then compete on the downstream market. It is often argued that resellers intensify competition and benefit consumers, in particular when wholesale prices are...

We study an industry in which an upstream monopolist supplies an essential input at a regulated price to several downstream firms. Legal unbundling means that a downstream firm owns the upstream firm but this upstream firm is legally independent and maximizes its own upstream profits. We allow...

We study an industry with a monopolistic bottleneck (e.g. a transmission network) supplying an essential input to several downstream firms. Under legal unbundling the bottleneck must be operated by a legally independent upstream firm, which may be partly or fully owned by an incumbent active in...

Linear demand formulations for price competition in horizontally differentiated products are sometimes used to compare situations where additional varieties become available, e. g. due to market entry of new firms. We derive a consistent demand system to analyze such situations.

Liberalization of network industries frequently separates the network from the other parts of the industry. This is important in particular for the electricity industry where private …rms invest into generation facilities, while network investments usually are controlled by regulators. We...

Private operation of port facilities is becoming increasingly common worldwide and many governments consider the privatization of public ports as a policy option. We investigate the effect of port privatization in a setting with two ports located in different countries, serving their home market...

A fully unbundled, regulated network firm of unknown efficiency level can untertake unobservable effort to increase the likelihood of low downstream prices, e.g. by facilitating downstream competition. To incentivize such effort, the regulator can use an incentive scheme paying transfers to the...

In some markets vertically integrated firms sell directly to final customers hut also to independent downstream firms with whom they then compete on the downstream market. It is often argued that resellers intensify competition and benefit consumers, in particular when wholesale prices are...

Nach einer Welle der Privatisierung öffentlicher Dienstleistungen in den 1980er und 1990er Jahren möchten viele Gemeinden jetzt wieder stärker die Daseinsvorsorge direkt gestalten. Dabei stellt sich die Frage 'privat oder staatlich' nur bei solchen Angeboten, die tatsächlich öffentliche...