We analyse 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. Our first results is that export...

Die Bundesnetzagentur hat im Rahmen der Frequenzvergabe 2019 für den Mobilfunk die Netzanbieter verpflichtet, einen bestimmten Versorgungsgrad der Bevölkerung zu erreichen. Erstmals wurden dabei auch Kooperationen zwischen verschiedenen Netzanbietern erlaubt. Es wurde jedoch offengelassen,...

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...