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Income Elasticity of Demand quiz

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  • What does income elasticity of demand measure?
    It measures how the quantity demanded of a good responds to changes in consumer income.
  • What is the formula for income elasticity of demand?
    It is the percentage change in quantity demanded divided by the percentage change in income.
  • How does the formula for income elasticity differ from price elasticity?
    Income elasticity uses income in the denominator instead of price, but quantity remains in the numerator.
  • What method is commonly used to calculate income elasticity of demand?
    The midpoint method is commonly used, similar to price elasticity calculations.
  • What does a positive income elasticity value indicate about a good?
    A positive value indicates the good is a normal good, meaning demand increases as income increases.
  • What does a negative income elasticity value indicate about a good?
    A negative value indicates the good is an inferior good, meaning demand decreases as income increases.
  • What does an income elasticity greater than 1 signify?
    It signifies the good is a luxury (income elastic), with demand increasing more than the increase in income.
  • What does an income elasticity between 0 and 1 signify?
    It signifies the good is a necessity (income inelastic), with demand increasing less than the increase in income.
  • In the caviar example, what was the calculated income elasticity of demand?
    The calculated income elasticity was 2, indicating caviar is a normal, luxury good.
  • Why is price held constant when calculating income elasticity of demand?
    Price is held constant to isolate the effect of income changes on quantity demanded, following ceteris paribus.
  • What is the significance of positive and negative values in income elasticity calculations?
    They help identify whether a good is normal (positive) or inferior (negative).
  • What are the steps in the midpoint method for income elasticity calculation?
    Subtract, sum, divide by 2, divide step 1 by step 3, calculate elasticity, and analyze sign for normal/inferior goods.
  • How do you determine if a good is a necessity or a luxury using income elasticity?
    If elasticity is between 0 and 1, it's a necessity; if greater than 1, it's a luxury.
  • What happens to demand for inferior goods when income increases?
    Demand for inferior goods decreases when income increases, resulting in negative income elasticity.
  • What is the relationship between income changes and demand for normal goods?
    Demand for normal goods increases as income increases, resulting in positive income elasticity.