Two retailers operate in a monopsonistic, oligopolistic environment. They have to buy from spatially dispersed suppliers and use uniform pricing downstream. We characterize prices and location in the two-stage location-then-price game under two different pricing policies in the upstream market:...

Lecture on the first SFB/TR 15 meeting, Gummersbach, July, 18 - 20, 2004: We develop a general theoretical framework of trade on a platform on which buyers and sellers interact. The platform may be owned by a single large, or many small independent or vertically integrated intermediaries. We...