Other
Marietta College: Umw: Oligopoly and Interdependence in the Classroom
This site provides an example of a game tree associated with firms in an oligopoly. This in-class experiment could be used to help study oligopolies, interdependence of firms, or collusion.
Curated OER
The Prisoner's Dilemma and Duopoly
This site focuses on the interdependence of firms in an oligopoly, and shows through the use of a game tree how these firms are tempted towards the practice of collusion.