ECON 1000 Lecture Notes - Monopolistic Competition, Product Differentiation, Demand Curve
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Monopolistic competition is a market with the following characteristics: Firms compete on product quality, price, and marketing. Firms are free to enter and exit the industry. Firms in monopolistic competition practice product differentiation, which means that each firm makes a product that is slightly different from the products of competing firms. Product differentiation enables firms to compete in three areas: quality, price, and marketing. Because firms produce differentiated products, each firm has a downward-sloping demand curve for its own product. Differentiated products must be marketed using advertising and packaging. There are no barriers to entry in monopolistic competition, so firms cannot earn an economic profit in the long run. The firm produces the quantity at which marginal revenue equals marginal cost and sells that quantity for the highest possible price. It earns an economic profit (as in this example) when p > atc. In the long run, economic profit induces entry.