Since the introduction of mobile telephony in the early fifties in Europe, US and Japan the demand for this service exploded. It seems that the latent demand for mobile telecommunication services for decade's continued to be very strong. Since the introduction of cellular technology the capacity...

Since the introduction of mobile telephony in the early fifties in Europe, US and Japan the demand for this service exploded. It seems that the latent demand for mobile telecommunication services for decade's continued to be very strong. Since the introduction of cellular technology the capacity...

Die Regulierung von Märkten für innovative digitale Produkte und Dienste wirft eine Reihe grundsätzlicher Fragen auf, die nachfolgend zunächst aus theoretischer Sicht betrachtet werden. Dabei werden auch Aspekte des Schumpeterschen Innovationswettbewerbs in offenen Volkswirtschaften...

We study how the vertical industry structure affects investment in network quality and social welfare, with a focus on the prospective deployment of high-speed broadband access networks (the so-called NGA). We model pros and cons of vertical separation, namely, pro-competitive effects and loss...

Will improvements in information technology eliminate face-toface interactions and make cities obsolete? In this paper, we present a model where individuals make contacts and choose whether to use electronic or face-to-face meetings in their interactions.