Bei der Einführung innovativer Kommunikationsdienste stehen Anbieter vor der Aufgabe, einen Markt zu schaffen, denn Nachfrager sind erst dann bereit, in die Kommunikationstechnologie zu investieren, wenn eine zufrieden stellende Teilnehmerzahl erreicht wird. Der Aufbau positiver Erwartungen...

This study presents the first empirical test with German establishment level data of a hypothesis derived by Helpman et al. (2004) in a model that explains the decision of heterogeneous firms to serve foreign markets either through exports of foreign direct investment: only the more productive...

This paper presents the first empirical test with German establishment level data of a hypothesis derived by Helpman, Melitz and Yeaple in a model that explains the decision of heterogeneous firms to serve foreign markets either trough exports or foreign direct investment: only the more...

The paper examines the relation between industrial mix and regional productivity growth. For this purpose, a dynamic model of the open economy with differentiated sectoral knowledge formation and incomplete interregional knowledge diffusion is constructed. The theoretical framework is first used...