Algorithmic collusion is a hot topic within antitrust circles in Europe, US and beyond. But some economists downplay algorithmic collusion as unlikely, if not impossible. This paper responds to these criticisms by pointing to new emerging evidence and the gap between law and this particular...

Chapter prepared for publication in Oxford Handbook on International Antitrust Economics, Roger D. Blair and D. Daniel Sokol, editors. Cartels occur in a wide range of industries and engage in a wide range of behaviors in their efforts to increase profits. In this chapter, we discuss the wide...

Fershtman and Judd (1987) and Sklivas (1987) show that strategic delegation reduces firm profits in the one-shot Cournot game. Allowing for infinitely repeated interaction, strategic delegation can increase firm profits as it improves cartel stability.

In contrast to the existing literature on repeated games that assumes a Þxed discount factor, I study an environment in which it is more realistic to assume a ßuctuating discount factor. In a repeated oligopoly, as the interest rate changes, so too does the degree to which Þrms discount the...

We examine coordinated effects of mergers in the Swedish retail market for gasoline during the period 1986-2002. Despite significant changes in market concentration and many factors conductive to coordination, the empirical analysis shows that the level of coordination is low. In addition,...

This paper contributes to the study of tacit collusion by analyzing infinitely repeated multiunit uniform price auctions in a symmetric oligopoly with capacity constrained firms. Under both the Market Clearing and Maximum Accepted Price rules of determining the uniform price, we show that when...

This paper analyzes the impact vertical integration has on upstream collusion when the price of the input is linear. As a first step, the paper derives the collusive equilibrium that requires the lowest discount factor in the infinitely repeated game when one firm is vertically integrated. It...

This paper analyzes dynamic cartel formation and antitrust enforcement when firms operate in demand-related markets. We show that cartel prosecution can have a knock-on effect: desisting a cartel in one market reduces profits and cartel stability and leads to the break-up of the cartel in the...

In this paper we analyze cartel formation and self-reporting incentives when firms operate in several geographical markets and face antitrust enforcement in different jurisdictions. We are concerned with the effectiveness of leniency programs and the benefits of international antitrust...

Colluding firms often exchange private information and make transfers within the cartels based on the information. Estimating the impact of such collusive practices'€" known as the 'lysine strategy profile (LSP)€'€" on cartel duration is difficult because of endogeneity and omitted...