Definition
Elasticity of Supply: Elasticity of supply measures the responsiveness of the quantity supplied of a good to a change in its price. It is computed as the percentage change in the quantity supplied divided by the percentage change in price. Supply is said to be elastic if the elasticity exceeds 1 and inelastic if it is less than 1. High price elasticity indicates that supply can significantly increase in response to price changes.
Elasticity of Demand: Elasticity of demand measures the responsiveness of the quantity demanded of a good to a change in its price. It is calculated as the percentage change in the quantity demanded divided by the percentage change in price. Demand is considered elastic if the elasticity exceeds 1 and inelastic if it is less than 1. For example, the demand for luxury items may decrease dramatically if prices rise, as these purchases are not essential and can be postponed.
Examples
Elastic Supply Example: Agricultural products often demonstrate elastic supply. A small increase in the price of wheat might lead to a substantial increase in the quantity supplied, as farmers shift production to capitalize on higher prices.
Inelastic Supply Example: Real estate development demonstrates inelastic supply. A significant price increase in real estate does not immediately lead to a proportional increase in new houses due to long construction lead times and zoning regulations.
Elastic Demand Example: Luxury goods like high-end cars often exhibit elastic demand. A small increase in the price can substantially reduce the quantity demanded as consumers may opt for less expensive alternatives.
Inelastic Demand Example: Essential medications show inelastic demand. Even substantial price increases have little effect on the quantity demanded because these medications are necessary for consumers.
Frequently Asked Questions
What does a price elasticity of 1 mean?
A price elasticity of 1, or unit elastic, indicates that the percentage change in quantity demanded or supplied is exactly equal to the percentage change in price.
How is elasticity different for necessities vs. luxury goods?
Necessities typically have inelastic demand because consumers will continue to purchase them regardless of price changes. Luxury goods have elastic demand as consumers are more sensitive to price changes and can defer purchases.
What factors influence the elasticity of supply?
Factors include production flexibility, time period for production, availability of factors of production, and mobility of factors of production.
Why is elasticity important for businesses?
Understanding elasticity helps businesses set prices, forecast revenue, and develop strategies for supply chain management.
How does income affect elasticity of demand?
Income levels can impact demand elasticity. Higher income consumers may have more elastic demand for luxury items, while lower income consumers may have more inelastic demand for essential goods.
Related Terms
- Cross-Price Elasticity of Demand: Measures the responsiveness of the quantity demanded for one good to a change in the price of another good.
- Income Elasticity of Demand: Measures the responsiveness of the quantity demanded to changes in consumer income.
- Perfect Elasticity: When a small price change causes an infinite change in quantity demanded or supplied.
- Perfect Inelasticity: When price changes have no effect on the quantity demanded or supplied.
Online Resources
Suggested Books for Further Studies
- “Principles of Economics” by N. Gregory Mankiw
- “Microeconomics: Theory and Applications with Calculus” by Jeffrey M. Perloff
- “Intermediate Microeconomics: A Modern Approach” by Hal R. Varian