Antitrust authorities often consider parallel pricing and market share stability to be clues of illegal collusion. To analyze whether this inference is correct, I develop a model of price competition with differentiated products in which demand and costs vary over time. In many cases parallel...

This paper describes a price game in which buyers’ decisions about how much and where to buy are based on different information and/or preferences. Such consumers’ behavior is likely when demand comes from public agencies and state-owned firms. Consumers in this case are said to be...

In this paper we analyze a model of price competition in a market for a homogeneous product in which consumers express a probabilistic demand. A parameter, θ, describes the degree of precision with which consumers evaluate prices. We show that, according to the value of θ, the market can...

Antitrust authorities often consider parallelism of firms' strategies and market share stability as clues of illegal collusion in the form of concerted practices. In this paper I show that this inference may be contrary to some theoretical results. I develop a model of price competition with...

We study the effect of a merger in a dynamic high-technology industry-the videogame market- which is characterized by frequent introduction of new products. To assess the impact of the merger between two large specialist retailers in the UK, we perform a difference-in-differences analysis...

We study the effect of a merger in a dynamic high-technology industry - the videogame market - which is characterized by frequent introduction of new products. To assess the impact of the merger between two large specialist retailers in the UK, we perform a difference-in-differences analysis...