We develop a model of vertical merger waves leading to input foreclosure. When all upstream firms become vertically integrated, the input price can increase substantially above marginal cost despite Bertrand competition in the input market. Input foreclosure is easiest to sustain when upstream...

In telecommunications some operators have deployed their own networks whereas some others have not. The latter firms must purchase wholesale products from the former to be able to compete on the final market. We show that, even when network operators compete in prices and offer perfectly...

Decisions of national competition authorities have important effects on other jurisdictions. We provide a framework to quantify the domestic and cross-border effects of mergers, and to draw conclusions for the coordination of national merger policies. We develop a two-country model with many...

There has been a wide-spread misconception based on the imprecise wording of Art. 52 of the European Patent Convention (EPC) that the protection of business methods by patents is prohibited in Europe. This paper investigates the legal framework set by patent laws with respect to the...

Der Beitrag diskutiert die Anwendung des im Rahmen der Unternehmensbewertung häufig angewandten Gordon/Shapiro-Modells bei Vorliegen von Inflation sowie persönlichen Steuern. Gezeigt wird, dass sich steuerlich bedingtes und inflationsinduziertes Wachstum parallel im Kalkül erfassen lassen,...