This website describes the conditions of a "perfectly competitive" market structure, and the obstacles that the individual firm in this market will face.

This site uses graphs to show how changes in demand would change a firm's output, price, and profits or losses in a monopolistically competitive market structure.

This site shows cost curves for a firm in a perfectly competitive market, and has an interactive graph to show what their profit margin is at various levels of production.

This site provides a clear description of the requirements and conditions needed in a market for it to be labeled a perfectly competitive market. The topics of allocative efficiency and productive efficiency are also addressed.

This site offers economics-based newspaper headlines and asks follow-up questions based on supply and demand in a perfectly competitive market.

This site offers a variety of economics-related newspaper headlines in perfectly competitive markets, and each headline offers discussion questions related to that topic.

This site provides an in-depth examination of monopolistic competition, along with appropriate levels of output, price, and corresponding profits. This site is for the advanced student of economics.

This site provides an in-depth study of a "differentiated oligopoly," and uses supporting graphs. For the advanced economics student.

This site from Score provides information on the global marketplace. This is a unit where students are grouped to find out the best Latin American country to introduce a new fast food business. Site is very well outlined and includes...

This article asks whether or not Abercrombie & Fitch is "so popular" that it has become "not as popular" with teens anymore. A good example of a firm in a monopolistically competitive market structure. (02/22/2000)

This site offers a description of a price taker and the characteristics in this sellers' market structure. The price taker is examined in both the short run and the long run.

This site provides a simple and easy-to-understand definition of monopolistic competition.

This site uses an example of "pushcarts on the beach" to demonstrate a monopolistically competitive market structure and how as more firms enter the market, price, quantity, and deadweight loss are all effected.

This site lists the characteristics of an oligopoly, and discusses price competition, non-price competition, and price leadership.

This article discusses McDonald's new ad campaign in 1997 to compete against Burger King, Wendy's, and other restaurants in a very competitive market. (10/02/1997)

This site uses interactive graphs to show how changes in demand would change a firm's output, price, and profits or losses in a monopolistically competitive market structure.

This article discusses how two entrepreneurs went to New York City to see what was "hot," and brought those ideas to a hungry Pittsburgh region. (02/18/1997)

This on-line encyclopedia provides the legal definition and examples of a cartel.

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.

This news article discusses how stores at an Australian shopping mall colluded in order to drive out a new competitor, along with reasons given by the judge. (Dec 19, 2004)

This video teaches the concept of Profit. Profit is income received for entrepreneurial skills or risk taking and is calculated by subtracting a firm's costs of producing a good or service from the revenues received from selling the good...

This article compares national brands to generic brands, with respect to prices, customer satisfaction, and product differentiation.

Provides a detailed examination of the characteristics of a monopoly, along with various kinds of monopolies, such as natural, local, coercive, and others.

Provides a definition and describes the characteristics of an oligopoly.