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So what is today about then?
Title:
Price Elasticity of Demand
aka PED
Elasticity
“Elasticity is a measure of
the extent to which a
quantity responds to a
change in a variable.”
Price Elasticity of Demand
Elastic Inelastic
Percentage change in
Demand will be
Greater than change in price.
Percentage change in
price will be
Greater than change in demand.
“The responsiveness of
Demand to a change in price.”
Price Elastic Goods
• Very responsive to Price changes
• Many Substitutes (undifferentiated)
• Products widely available
Price
Inelastic Goods
• Less responsive to Price changes
• *** Inelastic goods are still affected by price rises! ***
• Inelastic goods tend to be…
– Highly branded (highly fashionable)
– Innovative
– In short supply
– Few Substitutes
– Habit Forming
Calculating P.E.D.
P.E.D. = Percentage change in Demand
Percentage change in Price
% Change = Difference x 100 = _____ %
Original
Calculating P.E.D.
Value Description Explanation
• 0 Perfectly Inelastic Price has no effect on
demand at all
• 0<1 Inelastic Price has a small effect
on demand
• 1 Unitary Changes are the same
• 1<Infinity Elastic Demand is very sensitive to
price
• Infinity Perfectly Any Increase in price, kill
Elastic demand
A Demand Curve of an Elastic Good
Price
Quantity Demanded
0
D
250
200
150
100
50
500400300200100 600
Total Revenue at £150
Price
Quantity Demanded
0
D
250
200
150
100
50
500400300200100 600
600 x 150
Total Revenue at £200
Price
Quantity Demanded
0
D
250
200
150
100
50
500400300200100 600
200 x 100
A Demand Curve of an Elastic Good
Price
Quantity Demanded
0
D
250
200
150
100
50
500400300200100 600
Revenue Lost Due
To Price
Increase
Revenue Gained
Due To Price
Increase
A Demand Curve of an Inelastic Good
Price
Quantity Demanded
0
D
250
200
150
100
50
10080604020 120
A Demand Curve of an Inelastic Good
Price
Quantity Demanded
0
D
250
200
150
100
50
10080604020 120
50 x 60
A Demand Curve of an Inelastic Good
Price
Quantity Demanded
0
D
250
200
150
100
50
10080604020 120
250 x 40
A Demand Curve of an Inelastic Good
Price
Quantity Demanded
0
D
250
200
150
100
50
10080604020 120
Revenue
Gained
Due To
Price
Increase
Revenue Lost Due
To Price
Increase
A Demand Curve of an Perfectly Inelastic
GoodPrice
Quantity Demanded
0
D
50
40
30
20
10
108642
A Demand Curve of an Perfectly Inelastic
GoodPrice
Quantity Demanded
0
D
50
40
30
20
10
108642
A Demand Curve of an Perfectly Inelastic
GoodPrice
Quantity Demanded
0
D
50
40
30
20
10
108642
A Demand Curve of an Perfectly Inelastic
GoodPrice
Quantity Demanded
0
D
50
40
30
20
10
108642
Revenue Gained Due
To Price
Increase
A Demand Curve of an Perfectly Elastic
GoodPrice
Quantity Demanded
0
D
1000
800
600
400
200
25020015010050
A Demand Curve of an Perfectly Elastic
GoodPrice
Quantity Demanded
0
D
1000
800
600
400
200
25020015010050
400 x 250
A Demand Curve of an Perfectly Elastic
GoodPrice
Quantity Demanded
0
D
1000
800
600
400
200
25020015010050
Revenue Lost Due
To Price
Increase
A Demand Curve for a Good with Unitary
Price ElasticityPrice
Quantity Demanded
0
D
y
x
z w
A Demand Curve for a Good with Unitary
Price ElasticityPrice
Quantity Demanded
0
D
y
x
z w
Revenue Lost Due To Price Increase
Revenue
Gained
Due To
Price
Increase
Summing Up
Elastic Goods
• Percentage change in Demand is greater than
percentage change in price.
• Highly responsive to price change
• Increases in price will lead to fall in total revenue.
Inelastic Goods
• Percentage change in Demand is Less than percentage
change in price.
• Slightly responsive to price change (BUT STILL
RESPONSIVE!)
• Increases in price will lead to a raise in total revenue.

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PED presentation copy

  • 1. So what is today about then?
  • 2.
  • 3. Title: Price Elasticity of Demand aka PED
  • 4. Elasticity “Elasticity is a measure of the extent to which a quantity responds to a change in a variable.”
  • 5. Price Elasticity of Demand Elastic Inelastic Percentage change in Demand will be Greater than change in price. Percentage change in price will be Greater than change in demand. “The responsiveness of Demand to a change in price.”
  • 6. Price Elastic Goods • Very responsive to Price changes • Many Substitutes (undifferentiated) • Products widely available
  • 7. Price Inelastic Goods • Less responsive to Price changes • *** Inelastic goods are still affected by price rises! *** • Inelastic goods tend to be… – Highly branded (highly fashionable) – Innovative – In short supply – Few Substitutes – Habit Forming
  • 8. Calculating P.E.D. P.E.D. = Percentage change in Demand Percentage change in Price % Change = Difference x 100 = _____ % Original
  • 9. Calculating P.E.D. Value Description Explanation • 0 Perfectly Inelastic Price has no effect on demand at all • 0<1 Inelastic Price has a small effect on demand • 1 Unitary Changes are the same • 1<Infinity Elastic Demand is very sensitive to price • Infinity Perfectly Any Increase in price, kill Elastic demand
  • 10. A Demand Curve of an Elastic Good Price Quantity Demanded 0 D 250 200 150 100 50 500400300200100 600
  • 11. Total Revenue at £150 Price Quantity Demanded 0 D 250 200 150 100 50 500400300200100 600 600 x 150
  • 12. Total Revenue at £200 Price Quantity Demanded 0 D 250 200 150 100 50 500400300200100 600 200 x 100
  • 13. A Demand Curve of an Elastic Good Price Quantity Demanded 0 D 250 200 150 100 50 500400300200100 600 Revenue Lost Due To Price Increase Revenue Gained Due To Price Increase
  • 14. A Demand Curve of an Inelastic Good Price Quantity Demanded 0 D 250 200 150 100 50 10080604020 120
  • 15. A Demand Curve of an Inelastic Good Price Quantity Demanded 0 D 250 200 150 100 50 10080604020 120 50 x 60
  • 16. A Demand Curve of an Inelastic Good Price Quantity Demanded 0 D 250 200 150 100 50 10080604020 120 250 x 40
  • 17. A Demand Curve of an Inelastic Good Price Quantity Demanded 0 D 250 200 150 100 50 10080604020 120 Revenue Gained Due To Price Increase Revenue Lost Due To Price Increase
  • 18. A Demand Curve of an Perfectly Inelastic GoodPrice Quantity Demanded 0 D 50 40 30 20 10 108642
  • 19. A Demand Curve of an Perfectly Inelastic GoodPrice Quantity Demanded 0 D 50 40 30 20 10 108642
  • 20. A Demand Curve of an Perfectly Inelastic GoodPrice Quantity Demanded 0 D 50 40 30 20 10 108642
  • 21. A Demand Curve of an Perfectly Inelastic GoodPrice Quantity Demanded 0 D 50 40 30 20 10 108642 Revenue Gained Due To Price Increase
  • 22. A Demand Curve of an Perfectly Elastic GoodPrice Quantity Demanded 0 D 1000 800 600 400 200 25020015010050
  • 23. A Demand Curve of an Perfectly Elastic GoodPrice Quantity Demanded 0 D 1000 800 600 400 200 25020015010050 400 x 250
  • 24. A Demand Curve of an Perfectly Elastic GoodPrice Quantity Demanded 0 D 1000 800 600 400 200 25020015010050 Revenue Lost Due To Price Increase
  • 25. A Demand Curve for a Good with Unitary Price ElasticityPrice Quantity Demanded 0 D y x z w
  • 26. A Demand Curve for a Good with Unitary Price ElasticityPrice Quantity Demanded 0 D y x z w Revenue Lost Due To Price Increase Revenue Gained Due To Price Increase
  • 27. Summing Up Elastic Goods • Percentage change in Demand is greater than percentage change in price. • Highly responsive to price change • Increases in price will lead to fall in total revenue. Inelastic Goods • Percentage change in Demand is Less than percentage change in price. • Slightly responsive to price change (BUT STILL RESPONSIVE!) • Increases in price will lead to a raise in total revenue.