This paper identifies conditions under which an industry-wide practice of posted (or list) pricing is a plus factor sufficient to conclude that firms violated Section 1 of the Sherman Act. For certain classes of markets, it is shown that, under competition, all firms setting a list price with a...

A theory of tacit collusion is developed based on coordination through price leadership and less than full mutual understanding of strategies. It is common knowledge that price increases are to be at least matched but who should lead and at what price is not common knowledge. The steady-state...

Collusion under imperfect monitoring is explored when firms' prices are private information and their quantities are public information; an information structure consistent with several recent price-fixing cartels such as those in lysine and vitamins. For a class of symmetric duopoly games, it...

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...

In the context of an infinitely repeated Prisoners' Dilemma, we explore how cooperation is initiated when players communicate and coordinate through their actions. There are two types of players - patient and impatient - which are private information. An impatient type is incapable of...

In the context of an infinitely repeated Prisoners.Dilemma, we explore how cooperation is initiated when players signal and coordinate through their actions. There are two types of players - patient and impatient - and a player's type is private information. An impatient type is incapable of...

We hypothesize a particular source of cartel instability and explore its relevance to understanding cartel dynamics. The cartel instability is rooted in the observation that, upon cartel formation, the relative positions of firms are often fixed which may lead some growthconscious members to be...