Robert Schenk, PhD
Cyber Economics: The Theory of Few Sellers
An overview of monopoly, oligopoly and duopoly, focusing on the interdependence of firms in an oligopoly, shown through the use of a game tree how these firms are tempted towards the practice of collusion.
Other
South Western Learning: Oligopoly/monopolistic Competition: Kinked Demand Curve
This South-Western College Publishing website describes a situation in which oligopolistic firms vie for competition among consumers.