Krugman's Economics For The Ap® Course
Krugman's Economics For The Ap® Course
3rd Edition
ISBN: 9781319113278
Author: David Anderson, Margaret Ray
Publisher: Worth Publishers
Question
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Chapter 5, Problem 1CYU
To determine

The question requires us to determine the events representing a shift in demand curve and movement along the demand curve.

Expert Solution & Answer
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Explanation of Solution

The given options are:

  • In rainy days, demand for umbrella will rise and thus results in a change in demand or rightward shift in the demand curve.
  • When price of data falls, the quantity demanded for mobile data plans increase sharply and causes a movement along the demand curve.
  • Valentine’s Day generates a necessity to buy long-stem roses which results in the higher demand for roses. A higher demand for roses will shift the demand curve.
  • When price of a substitute rises, a consumer moves towards the consumption of cheaper products and thus causes the demand for expensive product to increase. An increase in demand will shift the demand curve rightward.
Economics Concept Introduction

Any change in demand will shift the demand curve while any change in quantity demanded will cause the movement along the demand curve.

The demand for a commodity will change due to the following reasons:

  • Change in price of relative goods (substitutes and complementary products) 
  • Change in taste and preferences 
  • Change in peoples’ income level 
  • Change in expectations
  • Change in number of consumers

Any change in price of the commodity changes the quantity demanded.

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