Under what circumstance(s) if any can an increase in the price of sanitizers induce a consumer to buy more of that good? Explain. Explain how a consumer should allocate expenditure in order to achieve maximum satisfaction and analyse how a rise in income might affect that allocation.

Principles of Economics (MindTap Course List)
8th Edition
ISBN:9781305585126
Author:N. Gregory Mankiw
Publisher:N. Gregory Mankiw
Chapter21: The Theory Of Consumer Choice
Section: Chapter Questions
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A consumer has income of $15,000. Masks costs $35 per mask, and sanitizers costs $70 per bottle.

solve questions 4 and 5

  1. Draw the consumer’s budget constraint (put mask on the horizontal axis). What is the slope of this budget constraint? 
  2. Suppose his income increases from $15,000 to $20,000. Illustrate what happens if both masks and sanitizers are normal goods. Illustrate what happens if a mask is an inferior good. 
  3. The price of masks rises from $35 to $40 per mask, while the price of sanitizers is unchanged. For a consumer with constant income of $15,000, show what happens to consumption of both goods (assume both goods are normal goods). Decompose the change into income and substitution effects. 
  4. Under what circumstance(s) if any can an increase in the price of sanitizers induce a consumer to buy more of that good? Explain.
  5. Explain how a consumer should allocate expenditure in order to achieve maximum satisfaction and analyse how a rise in income might affect that allocation. 
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