Macroeconomics (Book Only)
Macroeconomics (Book Only)
12th Edition
ISBN: 9781285738314
Author: Roger A. Arnold
Publisher: Cengage Learning
Question
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Chapter 3, Problem 1VQP
To determine

Derivation of the market demand curve and its diagrammatic representation.

Expert Solution & Answer
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Explanation of Solution

The market demand curve can be derived by adding each individual’s quantity demand at a different price. It can be represented as follows:

Macroeconomics (Book Only), Chapter 3, Problem 1VQP

In Figure 1, both panels (a) and (b) indicate the individual demand curve of Buyer 1 and Buyer 2, respectively, where the horizontal axis represents quantity demanded and the vertical axis represents the price of the good. In the figure, Buyer 1 demanded 10 units and Buyer 2 demanded 9 units at $9. Therefore, the total quantity demanded at $9 is 19 units. Similarly, Buyer 1 demanded 20 units and Buyer 2 demanded 18 units at $7. Hence, the total quantity demanded at $7 is 38 units. In Panel (c), the vertical axis represents the total quantity demanded in the market and the vertical axis represents price. By plotting each individual’s quantity demand at different prices creates a market demand curve.

Economics Concept Introduction

Demand curve: A demand curve shows the level of quantity demanded at different price levels. Since there is a negative relationship between the price and the quantity, the demand curve slopes downward.

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