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प्रश्न
What are the methods of measuring Elasticity of demand?
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उत्तर
There are three methods of measuring the elasticity of demand.
The percentage method:
Ep = `(ΔQ)/(ΔP)xx P/Q`
It is also known as the ratio method when we measure the ratio as
Ep = `(%ΔQ)/(%ΔP)`
% ∆Q = percentage change in demand, %∆P = Percentage change in price.
Total outlay method:
Marshall suggested that the simplest way to decide whether demand is elastic or inelastic is to examine the change in the total outlay of the consumer or total revenue of the firm.
Total revenue = Price × Quantity sold
TR = P × Q
Total outlay method:
| Price | Quantity Demanded | Total Outlay | Elasticity |
| 150 | 3 | 450 | e > 1 |
| 125 | 4 | 500 | e = 1 |
| 100 | 5 | 500 | e < 1 |
| 75 | 6 | 450 |
Demand is elastic if there is an inverse relationship between price and total outlay, and direct relation means inelastic. Elasticity is unity when the total outlay is constant.
संबंधित प्रश्न
Explain the factors determining the elasticity of demand.
A consumer buys 18 units of a good at a price of Rs 9 per unit. The price elasticity of demand for the good is (–) 1. How many units the consumer will buy at a price of Rs 10 per unit? Calculate.
The price elasticity of demand for a good is - 0.4. If its price increases by 5 percent, by what percentage will its demand fall? Calculate.
What will be the effect of 10 percent rise in price of a good on its demand if price elasticity of demand is (a) Zero, (b)-1, (c)-2.
As we move along a downward sloping straight line demand curve from left to right, price
an elasticity of demand : (choose the correct alternative)
(a) remains unchanged
(b) goes on falling
(c) goes on rising
(d) falls initially then rises
A consumer spends Rs 400 on a good priced at Rs 8 per unit. When its price rises by 25 percent, the consumer spends Rs 500 on the good. Calculate the price elasticity of demand by the Percentage method.
A consumer spends Rs 200 on a good priced at Rs 5 per unit. When the price falls by 20 percent, he continues to spend Rs 200. Find the price elasticity of demand by percentage method.
Define or explain the following concept.
Unitary elastic demand.
What is the elasticity of demand?
Give reasons or explain the following statements
Demand for basic necessities is inelastic.
State whether the following statements are TRUE or FALSE :
The demand of foodgrains is inelastic.
Fill in the blanks with appropriate alternatives given in the bracket.
Demand elasticity can be measured from demand curve by ___________ method.
What do you mean by complements? Give examples of two goods which are complements of each other.
Explain price elasticity of demand.
Consider the demand curve D(p) = 10 − 3p. What is the elasticity at price `5/3` ?
Give reason or explain the following statement.
All desires are not demand.
Fill in the blank with appropriate alternatives given below:
Cross elasticity of demand is applicable to ____________ goods.
State whether the following statement is TRUE and FALSE.
Unitary Elastic Demand rarely occurs in practice.
Give reason or explain the following statement:
Concept of Elasticity of Demand helps trade union leaders.
Write short answer for the following question :
Total outlay method of measuring price elasticity of demand.
Define price elasticity of demand.
State whether the following statement is true or false. Give valid reasons in support of your answer.
Luxury goods often have lower price elasticity of demand.
Choose the correct answer from given options.
The expenditure on a good would change in the opposite direction as the price changes only when demand is ______
Answer the following question.
When the price of X doubles, its quantity demanded falls by 60 percent. Calculate its price elasticity of demand. What should be the percentage change in price so that its quantity demanded doubles?
Arrange the following coefficients of price elasticity of demand in ascending order:
(−) 3.1, (−) 0.2, (−) 1.1
Give an economic term:
Elasticity resulting from a proportionate change in quantity demanded due to a proportionate change in price.
Identify the correct pair of items from the following Columns I and II:
| Columns I | Columns II |
| (1) Perfectly elastic supply | (a) Es > 1 |
| (2) Perfectly inelastic supply | (b) Es < 1 |
| (3) Unitary elastic supply | (c) Es = 1 |
| (4) Relatively elastic supply | (d) Es = 0 |
Elasticity of the demand is available when:
Assertion (A): Elasticity of demand explains that one variable is influenced by another variable.
Reasoning (R): The concept of elasticity of demand indicates the effect of price and changes in other factors on demand.
Assertion (A) : A change in quantity demanded of one commodity due to a change in the price of other commodity is cross elasticity.
Reasoning (R) : Changes in consumers income leads to a change in the quantity demanded.
- Luxuries goods have generally elastic demand.
- Goods whose close substitutes are available have inelastic demand.
Define elasticity of demand.
When is the demand for a good said to be elastic?
What does elasticity of demand measure?
