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What is an Elasticity of Supply?
Grade Level:
Class 9
Law, Civic Literacy, Economics, FinTech, Geopolitics, Personal Finance, Indian Governance
Definition
What is it?
Elasticity of Supply measures how much the quantity of a product supplied by sellers changes when its price changes. It tells us if suppliers are quick to increase or decrease production in response to price shifts.
Simple Example
Quick Example
Imagine the price of mangoes suddenly goes up during summer. If farmers can quickly grow more mangoes or bring more existing stock to the market, the supply is 'elastic'. If they can't easily increase supply, like with very old, rare spices, the supply is 'inelastic'.
Worked Example
Step-by-Step
Let's calculate the Elasticity of Supply for samosas.
---Step 1: Initial Price (P1) = ₹10, Initial Quantity Supplied (Q1) = 100 samosas.
---Step 2: New Price (P2) = ₹12, New Quantity Supplied (Q2) = 120 samosas.
---Step 3: Calculate % Change in Quantity Supplied = ((Q2 - Q1) / Q1) * 100 = ((120 - 100) / 100) * 100 = (20 / 100) * 100 = 20%.
---Step 4: Calculate % Change in Price = ((P2 - P1) / P1) * 100 = ((12 - 10) / 10) * 100 = (2 / 10) * 100 = 20%.
---Step 5: Elasticity of Supply (Es) = (% Change in Quantity Supplied) / (% Change in Price) = 20% / 20% = 1.
---Answer: The Elasticity of Supply is 1.
Why It Matters
Understanding Elasticity of Supply helps businesses decide how much to produce and at what price. Economists and government planners use it to predict market reactions, impacting decisions in areas like trade policy and resource allocation. It's crucial for careers in market analysis, business management, and public policy.
Common Mistakes
MISTAKE: Confusing Elasticity of Supply with Elasticity of Demand. | CORRECTION: Elasticity of Supply focuses on the seller's response to price changes (how much they supply), while Elasticity of Demand focuses on the buyer's response (how much they demand).
MISTAKE: Forgetting to use percentage changes in the formula. | CORRECTION: The formula requires percentage changes in both quantity supplied and price, not just the absolute changes.
MISTAKE: Assuming all products have the same elasticity. | CORRECTION: Elasticity varies greatly between products; some are very elastic (like mobile data), others are inelastic (like rare medicines).
Practice Questions
Try It Yourself
QUESTION: If the price of a t-shirt increases by 10% and the quantity supplied increases by 15%, what is the Elasticity of Supply? | ANSWER: 1.5
QUESTION: A 5% increase in the price of milk leads to a 2% increase in the quantity of milk supplied. Is the supply of milk elastic or inelastic? Why? | ANSWER: Inelastic, because the percentage change in quantity supplied (2%) is less than the percentage change in price (5%).
QUESTION: The price of a specific type of organic wheat increases from ₹50/kg to ₹60/kg. Farmers initially supplied 200 kg, but after the price rise, they supplied 240 kg. Calculate the Elasticity of Supply. | ANSWER: Es = ((240-200)/200) / ((60-50)/50) = (40/200) / (10/50) = 0.2 / 0.2 = 1.0
MCQ
Quick Quiz
Which of the following would likely have the most 'elastic' supply?
Rare antique coins
Freshly baked bread
Crude oil
Specialized heart surgery equipment
The Correct Answer Is:
B
Freshly baked bread can be produced relatively quickly and easily in larger quantities if prices rise, making its supply elastic. The other options are harder to increase quickly.
Real World Connection
In the Real World
Food delivery apps like Zomato or Swiggy often see how 'elastic' the supply of delivery riders is. If they offer higher incentives (price), more riders (quantity supplied) might log on to deliver, especially during peak hours or festivals like Diwali. This helps them manage demand efficiently.
Key Vocabulary
Key Terms
SUPPLY: The amount of a good or service that producers are willing and able to sell at a given price | ELASTIC: When a small change in price leads to a large change in quantity supplied | INELASTIC: When a change in price leads to only a small change in quantity supplied | QUANTITY SUPPLIED: The specific amount of a good or service producers offer for sale at a particular price
What's Next
What to Learn Next
Next, you should learn about 'Factors Affecting Elasticity of Supply'. This will help you understand WHY some products have elastic supply and others have inelastic supply, building on what you've learned today.
