A two-part tariff is a pricing scheme according to which the buyer pays to the seller a fixed fee and a constant charge for each unit purchased. When it is used, the average price paid decreases as more units are purchased. Further, it is the marginal charge and not the fixed fee that determines...

We explore the nature of two-part tariff competition between duopolists providing a homogeneous service when consumers differ with respect to their usage rates. Competition in only one price component (the fixed fee or the rate) may allow both firms to enjoy positive profits if the other price...

We set-up a linear city model with duopoly upstream and downstream. Consumers have a transportation cost when buying from a retailer, and retailers have a transportation cost when buying from a wholesaler. We characterize the equilibria in a five-stage game where location and pricing decisions...

We investigate the endogenous determination of contracts in competing vertical chains where upstream and downstream firms bargain first over the type of contract and then over the contract terms. Upstream firms always opt for non-linear contracts, which specify the input quantity and its total...

We examine price competition under product-specific network effects, in a duopoly where the products are differentiated horizontally and vertically. When consumers' expectations are not affected by prices, firms may share the market equally, or one firm (possibly the low-quality one) may capture...

We examine a linear city duopoly where firms choose their locations to maximize expected profits, uncertain about how consumers will assess the relative quality of their products. Equilibrium locations depend on the ratio of the expected quality superiority to the strength of horizontal...

We set up a duopoly model with dynamic capacity constraints under demand uncertainty. We endogenize the investment decisions of the ?rms, examine their intertemporal pricing behavior, their incentives to merge, as well as the welfare implications of a merger. Whereas under known and constant...

We examine oligopolistic markets with both intrabrand and interbrand competition. We characterize equilibrium contracts involving a royalty (or wholesale price) and a fee when each upstream firm contracts with multiple downstream firms. Royalties control competition between own downstream firms...

A dynamic entry and exit game is studied, where, following Dixit and Shapiro (1986), firms play symmetric mixed strategies. Due to coordination considerations, the value of incumbency is increasing in the number of incumbent firms (up to the point where there is excess capacity). This feature of...

We analyse a set of simple dynamic models where sellers are capacity constrained over the length of the model. Buyers act strategically in the market, knowing that their purchases may affect future prices. The model is examined when there are single and multiple buyers, with both linear and...