This paper studies competition in the German market for mobile telecommunications, motivated by recent suggestions that T-Mobile and Vodafone possess a position of collective dominance. Allegedly, their position of joint dominance is secured through a combination of first-mover advantages and...

This paper explores how consumers react towards price differentiation between on-net and off-net calls in mobile telecommunications - a pricing policy that is common in many mobile telecommunications markets. Based on a survey of 1044 students we demonstrate that some consumers may suffer from a...

This paper estimates demand elasticities for the Turkish mobile telecommunication market. In contrast to most other studies, firm level data is used to estimate dynamic panel data models including instrumental variable techniques. Both short- and long-run elasticities are calculated, yielding a...

Kaum eine ordnungspolitische oder regulatorische Frage hat in der deutschen Telekommunikationsbranche wohl in den letzten Jahren für so viel Aufruhr gesorgt, wie die Einführung des neuen §9a in das Telekommunikationsgesetz (TKG). Die neue Vorschrift sieht vor, dass die Bundesnetzagentur...

Der vorliegende Beitrag analysiert die Vor- und Nachteile alternativer Allokationsmechanismen für das 900- und 1800-MHz-Frequenzspektrum, dessen Nutzungsrechte Ende 2016 auslaufen. Im Wesentlichen bestehen zwei Optionen. Zum einen die Möglichkeit der Verlängerung der aktuellen Nutzungsrechte,...

Given various recent antitrust investigations on the retail sector, we deal with uncovering demand systems substitution patterns for a particular market (diapers) to investigate the inter-format competition (supermarkets vs. discounters vs. drugstores). Using the uncovered demand system we...

Competition authorities and regulatory bodies have increasingly made use of econometric and statistical methods in their analysis. Due to limitations of time and data, so-called screening methods have become more and more important in order to decide whether an in-depth inquiry is warranted....