Oligopolists look for signals from one another in planning their strategies. Some signals solicit cooperation from rivals and a still smaller number succeed in achieving noncompetitive equilibria. But only a subset of these noncompetitive outcomes involve agreements under Section 1 of the...

The antitrust laws are increasingly used to prosecute alleged acts of market manipulation, particularly against firms in the banking and energy industries. Both industries are now regulated subject to fraud-based market manipulation rules, but antitrust remains a vehicle on which private claims...

This paper studies cartels' strategic behavior in delaying leniency applications, a take-up decision that has been ignored in the previous literature. Using European Commission decisions issued over a 16-year span, we show, contrary to common beliefs and the existing literature, that...

We study cartels that operated in the US generic drug industry, leveraging quarterly Medicaid data from 2011-2018 and a difference-in-differences approach comparing the evolution of prices of allegedly collusive drugs with a group of competitive control drugs. Our analysis highlights (i) the...

This paper provides an overview of recent developments in algorithmic antitrust, and the economics and legal issues raised in the areas of abuse of dominance, algorithmic pricing and collusion, and mergers and acquisition. The general theme is that while much has been made of the possible...

Common ownership (also called horizontal shareholding) refers to a stock investor’s owner-ship of minority stakes in multiple competing firms. Recent empirical studies have purported to show that institutional investors’ common ownership reduces competition among commonly owned competitors....

The flow of resources across sectors to their best use, with concomitant entry and exit, is central to the functioning and welfare properties of a market economy. Nevertheless, most industrial organization research, including applications to competition policy, undertakes partial equilibrium...

Recent merger decisions by competition authorities have revived the debate on the relationship between competition and innovation. This article reviews this issue by drawing on the relevant economic literature, and by placing it in the broader policy debate on the benefits of competitive...

Some scholars have argued that the phenomenon known as common ownership, which refers to an investor's simultaneous ownership of small stockholdings in several competing companies, is anticompetitive and prohibited by the U.S. antitrust laws. These proponents target in particular large...