Following models of vertically differentiated duopoly this paper deals with the influence of a social health system on the sustainability of the duopoly and on the respective prices. Emphasis is laid on the effect of a reduction of the coinsurance rate for drugs on prices and on the market...

In a monopoly setting where consumers cannot observe the quality of the product we show that free samples which are of a lower quality than the marketed digital goods are used together with high prices as signals for a superior quality if the number of informed consumers is small and if the...

Dieser Beitrag gibt einen Überblick über die Debatte zur vertikalen Entflechtung der Stromwirtschaft in Europa. Zunächst wird die Entwicklung der EU Politik im Hinblick auf die vertikale Struktur in der Stromwirtschaft nachgezeichnet. Dann werden die theoretischen und empirischen Argumente...