The Four Types of Market Structure Number of firms? Many firms One firm/Few Type of Products? firms Differentiated Identical products products Monopoly oligopoly Monopolistic Perfect Competition Competitio Tap water Tennis balls Novels Wheat Cable v Crude oil Movies o Milk H arc Inc. items and derived items c ht o 2001 by Harcourt, IncHarcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. The Four Types of Market Structure Monopoly Oligopoly Monopolistic Competition Perfect Competition • Tap water • Cable TV • Tennis balls • Crude oil • Novels • Movies • Wheat • Milk Number of Firms? Type of Products? Many firms One firm Few firms Differentiated products Identical products