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INCOMEELASTICITY OF
DEMAND
Definition
Other things remaining the same, it
is degree of responsiveness of
quantity demanded of a commodity
due to chan...
In other words
Income Elasticity of Demand measures
by how much the quantity demanded
changes with respect to the change i...
Mathematical Expression
Where,
EY = Elasticity of demand
q = Original quantity demanded
∆q = Change in quantity demanded
y...
Practical Example
Suppose that the initial income of a person is
Rs.2000 and quantity demanded for the
commodity by him is...
Solution
Here, q = 100 units
∆q = (40-20) units = 20 units
y = Rs.2000
∆y = Rs. (3000-2000) =Rs.1000
Hence, an increase of...
Types of Income Elasticity of demand
1. Positive income elasticity of demand
(EY>0)
– Income elasticity greater then unity...
1. Positive income elasticity of demand
(EY>0)
If the quantity demanded for a commodity
increases with the rise in income ...
Income elasticity greater then unity
(EY > 1)
Percentage change in
quantity demanded for a
commodity is greater
than perce...
Income elasticity equal to unity
(EY = 1)
Percentage change in
quantity demanded for a
commodity is equal to
percentage ch...
Income elasticity less then unity
(EY < 1)
Percentage change in
quantity demanded for a
commodity is less than
percentage ...
2. Negative income elasticity of
demand ( EY<0)
Quantity demanded for a
commodity decreases
with the rise in income of
the...
3. Zero income elasticity of demand
( EY=0)
Quantity demanded for a
commodity remains
constant with any rise or
fall in in...
• To learn more visit
businesstopia.net/economics
• To get more resources related to Business
Studies join the facebook gr...
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Income elasticity of demand

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Income elasticity of demand is the degree of responsiveness of quantity demanded of a commodity due to change in consumer’s income, other things remaining constant. In other words, it measures by how much the quantity demanded changes with respect ot the change in income.

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Income elasticity of demand

  1. 1. INCOMEELASTICITY OF DEMAND
  2. 2. Definition Other things remaining the same, it is degree of responsiveness of quantity demanded of a commodity due to change in consumer’s income
  3. 3. In other words Income Elasticity of Demand measures by how much the quantity demanded changes with respect to the change in income.
  4. 4. Mathematical Expression Where, EY = Elasticity of demand q = Original quantity demanded ∆q = Change in quantity demanded y = Original consumer’s income ∆y = Change in consumer’s income
  5. 5. Practical Example Suppose that the initial income of a person is Rs.2000 and quantity demanded for the commodity by him is 20 units. When his income increases to Rs.3000, quantity demanded by him also increases to 40 units. Find out the income elasticity of demand.
  6. 6. Solution Here, q = 100 units ∆q = (40-20) units = 20 units y = Rs.2000 ∆y = Rs. (3000-2000) =Rs.1000 Hence, an increase of Rs.1000 in income i.e. 1% in income leads to a rise of 2% in quantity demanded.
  7. 7. Types of Income Elasticity of demand 1. Positive income elasticity of demand (EY>0) – Income elasticity greater then unity (EY > 1) – Income elasticity equal to unity (EY = 1) – Income elasticity less then unity (EY < 1) 2. Negative income elasticity of demand ( EY<0) 3. Zero income elasticity of demand ( EY=0)
  8. 8. 1. Positive income elasticity of demand (EY>0) If the quantity demanded for a commodity increases with the rise in income of the consumer and vice versa, it is said to be positive income elasticity of demand. For example: As the income of consumer increases, they consume more of superior (luxurious) goods.
  9. 9. Income elasticity greater then unity (EY > 1) Percentage change in quantity demanded for a commodity is greater than percentage change in income of the consumer, it is said to be income greater than unity
  10. 10. Income elasticity equal to unity (EY = 1) Percentage change in quantity demanded for a commodity is equal to percentage change in income of the consumer
  11. 11. Income elasticity less then unity (EY < 1) Percentage change in quantity demanded for a commodity is less than percentage change in income of the consumer
  12. 12. 2. Negative income elasticity of demand ( EY<0) Quantity demanded for a commodity decreases with the rise in income of the consumer and vice versa
  13. 13. 3. Zero income elasticity of demand ( EY=0) Quantity demanded for a commodity remains constant with any rise or fall in income of the consumer
  14. 14. • To learn more visit businesstopia.net/economics • To get more resources related to Business Studies join the facebook group Fb.com/groups/businessnotes
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Income elasticity of demand is the degree of responsiveness of quantity demanded of a commodity due to change in consumer’s income, other things remaining constant. In other words, it measures by how much the quantity demanded changes with respect ot the change in income.

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