Rice University
Principles of Economics: Regulating Natural Monopolies
This section from an Economics textbook explains why natural monopolies are allowed and how those monopolies can be regulated, usually by government, so that both companies and consumers are dealt with fairly.
Khan Academy
Khan Academy: Efficiency and Monopolies
Practice what you've learned about natural monopolies in this four-question exercise, including what makes a monopoly a natural monopoly, government regulation, and efficiency.
Khan Academy
Khan Academy: Monopoly
Practice what you have learned about the sources of monopolies and how a monopolist makes quantity and pricing decisions in this four-question exercise.
Khan Academy
Khan Academy: What Are Public Goods?
This resource explains what public goods are. This video lesson from Khan Academy is intended for students who are taking a microeconomics course.
Other
The Progress Report: Natural Monopolies
An article by Fred E. Foldvary detailing the meaning and purpose of different kinds of monopolies. (1999)