Figure 1 The Price Elasticity of Demand (e) Perfectly Elastic Demand: Elasticity Equals Infinity Quantity 0 Price $4 Demand 2. At exactly $4, consumers will buy any quantity. 1. At any price above $4, quantity demanded is zero. 3. At a price below $4, quantity demanded is infinite.
Cars Some High, very expensive Similar products, but with substitutes A Few Oligopoly Clothes: Shirts, pants Little Very Low Similar products, but with substitutes Many Monopolistic Competition Public Sewage Complete Difficult if not impossible Unique One Monopoly Agricultural products, stock None None, perfectly free to start a business Homogenous, Identical Many Perfect Competition Example Control Over Prices Barriers to Entry Variety of Goods Number of Firms Business Organization