We study imperfect and monopolistic competition with asymmetric preferences over a variety of goods provided by heterogeneous firms. We show how to compute equilibria through the Morishima elasticities of substitution. Simple pricing rules and closed-form solutions emerge under monopolistic...

We highlight the importance of ‘centrality' for pricing. Firms characterized by a more central position in a spatial network are more powerful in terms of having a stronger impact on their competitors' prices and on equilibrium prices. These propositions are derived froma simple theoretical...

Around the start of this new millennium, scholars in the operations management/operations research field started to make important contributions to the study of price competition models. In this tutorial, we review these contributions, and partition them into five broad areas. Most of the...

This paper addresses the effects of a prohibition on providing non-audit services (NAS) to audit clients. By combining a strategic auditor-client game with a circular market-matching model that has an endogenous number of auditors, we take into account the interdependence between the auditors'...

I study how sequential entry into an arbitrage affects the liquidity of underlying assets and the speed of arbitrage. Incumbent arbitrageurs exploit a mispricing between two identical but imperfectly liquid assets. Because of market thinness, incumbent arbitrageurs trade slowly to limit their...

Italian Abstract: Comnciando dal classico paradosso di Cournot viene mostrato quanto siano errate le ipotesi per giustificare una fusione. Viene poi calcolato il risultato di una fusione che lasci nel breve periodo costante la quota di mercato dell'impresa che non partecipa alla fusione e...

We analyze the impact of product bundling in experimental markets. One firm has monopoly power in a first market but competes with another firm in a second market. We compare treatments where the multiproduct firm (i) always bundles, (ii) never bundles, and (iii) chooses whether or not to...

This paper is about technology choices in a differentiated oligopoly. The main questions are: whether the position in the product space affects the choice of technology, how changes in fixed costs affect price outcomes, the strategic responses to policy interventions. The industry is an...

The presence of sticky, often labelled ‘unengaged', consumers is arguably one of the most intractable issues faced by competition regulators, in that it entrenches incumbency advantage. We develop a spatial linear model of heterogeneous switching costs that allows for asymmetric distributions...