deborahball1992
deborahball1992 6d ago โ€ข 0 views

Calculating YED: Definition and Example Calculations for UK Students

Hey there, future economists! ๐Ÿ‘‹ Struggling with YED? Don't worry, I've got you covered! This guide breaks it down with UK-specific examples and a quiz to test your knowledge. Let's ace those exams! ๐Ÿ’ฏ
๐Ÿ’ฐ Economics & Personal Finance

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clifford.ortiz Dec 27, 2025

๐Ÿ“š Quick Study Guide

  • ๐Ÿ“ˆ Definition: Income Elasticity of Demand (YED) measures the responsiveness of the quantity demanded for a good or service to a change in consumer income.
  • ๐Ÿงฎ Formula: YED = % Change in Quantity Demanded / % Change in Income. Mathematically, this is represented as: $YED = \frac{\% \Delta Q}{\% \Delta Y}$
  • โž• Positive YED: Indicates a normal good. As income increases, demand increases.
    • ๐ŸŽ Necessity (0 < YED < 1): Inelastic response to income changes (e.g., food).
    • ๐Ÿš— Luxury (YED > 1): Elastic response to income changes (e.g., designer clothes).
  • โž– Negative YED: Indicates an inferior good. As income increases, demand decreases (e.g., value brand products).
  • ๐Ÿ‡ฌ๐Ÿ‡ง UK Context: Consider how changes in average UK household income affect demand for various goods and services. For example, during periods of economic growth, demand for luxury cars tends to increase significantly.
  • ๐Ÿ“Š Calculation Example: If average UK incomes rise by 5% and the demand for organic vegetables increases by 8%, then YED = 8%/5% = 1.6 (a luxury good).

Practice Quiz

  1. Which of the following best describes Income Elasticity of Demand (YED)?
    1. The responsiveness of quantity supplied to a change in price.
    2. The responsiveness of quantity demanded to a change in price.
    3. The responsiveness of quantity demanded to a change in consumer income.
    4. The responsiveness of quantity supplied to a change in consumer income.
  2. If a good has a YED of -0.5, what type of good is it?
    1. Normal good
    2. Luxury good
    3. Inferior good
    4. Necessity
  3. If average UK household income increases by 3% and the demand for designer handbags increases by 9%, what is the YED for designer handbags?
    1. 0.33
    2. 3
    3. -3
    4. -0.33
  4. A YED value of 0.8 indicates which type of good?
    1. Inferior good
    2. Luxury good
    3. Necessity
    4. Giffen good
  5. During a recession in the UK, average incomes fall by 4%. If the demand for value-brand pasta increases by 6%, what is the YED for value-brand pasta?
    1. 1.5
    2. -1.5
    3. 0.67
    4. -0.67
  6. Which of the following goods is most likely to have a high positive YED?
    1. Basic food staples
    2. Generic medicine
    3. Luxury holidays
    4. Second-hand clothing
  7. If the YED for good X is 2.5, what does this indicate?
    1. Good X is an inferior good.
    2. Good X is a necessity.
    3. Good X is a luxury good and demand is highly responsive to income changes.
    4. Good X is income inelastic.
Click to see Answers
  1. C
  2. C
  3. B
  4. C
  5. B
  6. C
  7. C

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