Khan Academy
Khan Academy: Oligopoly and Game Theory: Foundational Concepts
Practice what you've learned about oligopolies and the basics of game theory, such as Nash equilibrium, in this four-question exercise.
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.