Competition authorities increasingly rely on economic screening tools to identify markets where firms deviate from competitive norms. Traditional screening methods assume that collusion occurs through secret agreements. However, recent research highlights that firms can use public announcements...

Collusion remains a strong undercurrent of business practice despite anti-cartel enforcement being a top priority of competition authorities. Alongside active prosecution of cartels, the study of cartels is a vibrant area of research for economic and legal scholars. A challenge for both practice...

Introduction -- General analysis of hub-and-spoke collusion -- Collusion to raise downstream prices : upstream supplier as hub -- Collusion to raise downstream prices : downstream intermediary as hub -- Collusion to exclude rival firms -- General assessment of hub-and-spoke cartels --...