The paper revisits the conventional wisdom according to which vertical restrictions on retail prices help upstream firms to collude. We analyse the scope for collusion with and without resale price maintenance (RPM) when retailers observe local shocks on demand or retail costs. In the absence of...

This paper studies how the existence of a potential entrant influences an incumbent’s choice of quality in a model of vertical product differentiation and entry. Both firms face fixed set-up costs and quality-dependent costs of production, and compete on quality and price. With identical...

We propose a simple theory of predatory pricing, based on scale economies and sequential buyers (or markets). The entrant (or prey) needs to reach a critical scale to be successful. The incumbent (or predator) is ready to make losses on earlier buyers so as to deprive the prey of the scale it...

Equilibrium prices of the variants of a differentiated commodity are shown to increase if the variants become closer substitutes, under a set of circumstances, which is by no means pathological. Rather, the underlying argument has a bearing on market prices, whenever a potential buyer does not...

In a model of vertical product differentiation, duopolistic firms face quality-dependent costs and compete on quality and price in two segmented markets. Minimum quality standards, set uniformly or according to the principle of mutual recognition, can be used to increase welfare. The analysis...

We develop a model of search among substitutes for the best combination of commodity variant and price, in which the structure of search costs can be manipulated by the suppliers of these variants, e.g. by joining an existing market or opening a new one. We analyse the subgame perfect equilibria...

In a model of vertical product differentiation, duopolistic firms face quality-dependent costs and compete on quality and price in two segmented markets. Minimum quality standards, set according to the principle of Mutual Recognition, can be used to increase welfare. The results of the one-shot...

We construct a model where an entrepreneur could either innovate for entry or for sale. It is shown that increased product competition tends to increase the relative profitability of innovation for sale relative to entry. Increased competition reduces entrants' and acquirers' profits in a...

Unprecendented growth of barter is a striking phenomenon of Russia's transition. The explanations of barter include tight monetary policy, tax evasion and poor financial intermediation. We show that the market power may also be important. We build a model of imperfect competition in which firms...