In 2020, the Department of Justice (DOJ) filed an antitrust suit against Google alleging that Google has unlawfully monopolized the markets for general search services, search advertising, and general search text advertising. The complaint raises questions involving market definition, monopoly...

In 2020, an antitrust lawsuit was filed against the Pork Integrators alleging a §1 Sherman Act violation. At the center of the Lawsuit, there is an alleged exchange of atomistic information about the Pork integrators’ operations using Agri Stats, Inc. as a clearinghouse. We use the Su-preme...

We discuss a subset of vertical mergers, where the exercise of market power and the efficiencies enabled by a vertical merger reduce rivals’ profits, making rivals’ exit a potentially serious concern. Rivals’ exit can fundamentally alter the welfare analysis of vertical mergers due to the...

Explicit collusion, or cartel behavior, involves coordinated efforts among firms within a market to restrict competition for their mutual benefit. Recidivism in this context occurs when cartel members, previously fined for such activities, establish a new cartel in the future. This paper...

The 2023 Merger Guidelines (MGs) change the Agencies’ narrative regarding non-horizontal mergers. They follow a four-pronged approach: (1) They blend horizontal and non-horizontal mergers. (2) They simplify the narrative about non-horizontal mergers. (3) They consoli- date and broaden the...

n 2020, an antitrust lawsuit was filed against the Pork Integrators alleging a §1 Sherman Act violation. At the center of the Lawsuit, there is an alleged exchange of atomistic information about the Pork integrators’ operations using Agri Stats, Inc. as a clearinghouse. We use the Supreme...

This study investigates the relationship between the optimal privatization policy and the degree of common ownership among private firms by formulating a mixed oligopoly model in which one public firm competes against private firms under common ownership. We find that depending on the private...

This study explores the critical role of market definition in antitrust and competition law, where defining the relevant market is fundamental for assessing competition between firms, products, and markets. Traditional methods for market definition, such as the SSNIP test, Critical Loss...

Recent antitrust regulations in several countries have granted exemptions for col- lusion aimed at achieving environmental goals. Firms can apply for exemptions if collusion helps to develop or to implement costly clean technology, particularly in sec- tors like renewable energy, where capital...

We compare the prevailing system of compulsory pre-merger notification with the Australian system of voluntary pre-merger notification. It is shown that, for a non-trivial set of parameter values, a perfect Bayesian equilibrium exists in mixed strategies in which the regulator investigates...