This paper considers a vertically separated industry with an upstream monopolist who supplies an essential input to two downstream Cournot firms. This situation is relevant to a number of sectors, including the telecommunications industry where trunk operators must have access to the local...

The problem of a monopolist firm that supplies an essential input to other firms that compete in the final downstream market is crucial in many utility industries that use a network. When downstream firms have different degrees of efficiency, then it could be feasible to charge them different...

Recently exchanges have been directly selling market data. We analyze how this practice affects price discovery, the cost of capital, return volatility, and market liquidity. We show that selling price data increases the cost of capital and volatility, worsens market efficiency and liquidity,...

Die Deutsche Telekom ist die mit Abstand größte Betreiberin von Fest- und Mobilfunknetzen in Deutschland. Deshalb kommt ihrer strategischen Positionierung nationale Bedeutung für die Entwicklung der infrastrukturellen Grundlagen der Digitalisierung zu. Nachfolgend wird angenommen, dass diese...