Principles of Economics (Second Edition)
2nd Edition
ISBN: 9780393614077
Author: coppock, Lee; Mateer, Dirk
Publisher: W. W. Norton & Company
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Chapter 4, Problem 4QFR
To determine
Relation between Price elasticity of demandandTotal Revenue
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- The Stopdecay Company sells an electric toothbrush for $25. Its sales have averaged 8,000 units per month over the past year. Recently, its closest competitor, Decayfigh ter, reduced the price of its electric toothbrush from $35 to $30. As a result, Stopde cays sales declined by 1,500 units per month. What is the arc cross elasticity of demand between Stopdecays toothbrush and Decayfighters toothbrush? What does this indicate about the relationship between the two products? If Stopdecay knows that the arc price elasticity of demand for its toothbrush is 1.5, what price would Stopdecay have to charge to sell the same number of units as it did before the Decayfighter price cut? Assume that Decayfighter holds the price of its toothbrush constant at $30. What is Stopdecays average monthly total revenue from the sale of electric toothbrushes before and after the price change determined in part (b)? Is the result in part (c) necessarily desirable? What other factors would have to be taken into consideration?arrow_forwardDefine the price elasticity of supply. Explain why the price elasticity of supply might be different in the long run than in the short run.arrow_forwardThe equation for a demand curve is P=2/Q. What is the elasticity of demand as price falls from 5 to 4? What is the elasticity of demand as the price falls from 9 to 8? Would you expect these answers to be the same?arrow_forward
- Explain why using the midpoint formula for calculating the elasticity of demand gives the same result whether price increases or decreases, but using the initial price and quantity instead of the average does not.arrow_forwardThe price elasticity of the demand for gasoline is -0.02. The price elasticity of demand for gasoline at Joe’s 66 station is -1.2. Explain what might account for the different elasticities.arrow_forwardThe quantity supplied of a good rises from 120 to 140 as price rises from 4 to 5.50. What is the price elasticity of supply of the good?arrow_forward
- What is the formula for line cross-price elasticity of demand?arrow_forwardIsabella always spends $50 on red roses each month and simply adjusts the quantity she purchases as the price changes. What can you say about Isabella's elasticity of demand for roses?arrow_forwardFrom the data in Table 5.5 about demand for smart phones, calculate the price elasticity of demand from: point B to point C, point D to point E, and point G to point H. Classify the elasticity at each point as elastic, inelastic, or unit elastic.arrow_forward
- Suppose you could buy shoes one at a time, miter than in pain. What do you predict the cross-price elasticity for left shoes and right shoes would be?arrow_forwardThe equation for a supply curve is P=3Q8. What is the elasticity in moving from a price of 4 to a price of 7?arrow_forwardAccording to the previous discussion, what factors influence the price elasticity of demand for cigarettes? What other factors not mentioned in the article might influence the price elasticity of demand for cigarettes?arrow_forward
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