Information and communication technologies are transforming economies and societies around the world. In this respect, E-Commerce has the capability to build a new global economy. That is why government, industries, non-profit-organisations, trade unions and consumers would like to come together...

In der Unterhaltungsbranche sind die Einkommen ausgesprochen ungleich verteilt. Einige wenige Stars erzielen im Vergleich zur Masse der Anbieter Spitzeneinkommen. Welche ökonomischen Mechanismen tragen zur Existenz von Superstars bei?

This paper shows that an incumbent monopolist's incentive confronting a new entrant depends on the degree of product differentiation and the strength of network externality. If products are homogeneous, the incumbent never wants to invite entry regardless of the degree of network externality. On...