We analyze a stylized model of the world grain market characterized by a small oligopoly of traders with market power on both the supply and demand side. Crops are stochastic and exporting countries can impose export tariffs to protect domestic food prices. We show that export tariffs are...

In a framework with an upstream monopoly and a downstream duopoly, we analyze the impact of convex costs on the downstream level. In contrast to the case of constant marginal costs, vertical integration does not imply complete market foreclosure. While the non-integrated downstream firm receives...

Die aktuell angespannte Lage auf dem Wohnungsmarkt hat zu weitreichenden Diskussionen und Forderungen nach regulierenden Eingriffen geführt. Tatsächlich sind die Angebotsmieten vor allem in Großstädten gestiegen: Während sie von 2010 bis 2022 im Durchschnitt um rund 55 Prozent geklettert...

The paper deals with the competitive effects of price guarantees in a spatial duopoly where consumers can search for lower prices but have to incur hassle costs if they want to claim a price guarantee. It is shown that symmetric equilibria with and without price guarantees exist but price...

In a framework with an upstream monopoly and downstream duopoly, we analyze the impact of vertical integration when downstream firms have convex costs.

We analyze the impact of vertical integration when a monopolistic producer can make a capital commitment before deciding on output.