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Marketing

Price and income elasticity of demand

  • 2 things to know
  • Components 01, 02 and 03

Overview

Recall questions on price elasticity of demand, its formula and why it is negative, elastic and inelastic demand, calculating it, its effect on total revenue, the factors that make demand elastic, branded products, income elasticity of demand, normal and inferior goods, and planning for a recession.

What you need to know

Answer each one before you reveal it.

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Key term

What is price elasticity of demand?

Key term

State the formula for price elasticity of demand.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is price elasticity of demand?

    Model answer

    Price elasticity of demand measures how much the quantity demanded changes in response to a change in price.

  2. 2

    State the formula for price elasticity of demand.

    Model answer

    Price elasticity of demand is the percentage change in quantity demanded divided by the percentage change in price.

  3. 3

    What does it mean for demand to be price elastic?

    Model answer

    It means quantity demanded changes proportionately more than price, giving a value greater than 1 when the sign is ignored.

  4. 4

    What does it mean for demand to be price inelastic?

    Model answer

    It means quantity demanded changes proportionately less than price, giving a value between 0 and 1 when the sign is ignored.

  5. 5

    Why is price elasticity of demand normally a negative figure?

    Model answer

    Price and quantity demanded move in opposite directions, so one of the two percentage changes is negative.

  6. 6

    A business raises its price by 10% and quantity demanded falls by 4%. Calculate the price elasticity of demand and state what it shows.

    Model answer

    The elasticity is −4% ÷ 10%, which is −0.4, so demand is price inelastic.

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