# Elasticity of Demand

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## What is Elasticity of Demand?

In economics, the elasticity of demand is a degree of change in the quantity demanded of a product in response to its determinants, such as the price of the product, price of substitutes, and income of consumers.

In economics, elasticity can be defined as the responsiveness of a variable (demand or supply) with respect to its various determinants.

## Elasticity of Demand Definition

The concept of elasticity was first introduced by Dr. Alfred Marshall, who is regarded as the major contributor of the theory of demand, in his book “Principles of Economics.”

According to him, “The elasticity (or responsiveness) of demand in a market is great or small according as the amount demanded increases much or little for a given fall in price, and diminishes much or little for a given rise in price.”

Elasticity of demand may be defined as the ratio of percentage change in demand to the percentage change in the price

Lipsey

The elasticity of demand is the proportionate change of amount purchased in response to a small change in price, divided by the proportionate change in price.

Mrs. Jone Robinson

The elasticity of demand may be defined as the percentage change in the quantity demanded which would result from one percent change in price.

Prof. Boulding

## Types of Elasticity of Demand

Economists have divided the elasticity of demand in three main categories. Three types of elasticity of demand is mentioned below:

### Price Elasticity of Demand

Definition: Price elasticity of demand is a measure of a change in the quantity demanded of a product due to change in the price of the product in the market.

#### Types of Price Elasticity of Demand

There are basically 5 types of price elasticity of demand:

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#### Factors Affecting Price Elasticity of Demand

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#### Importance of Price Elasticity of Demand

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### Income Elasticity of Demand

Definition: In Income elasticity of demand, the responsiveness of demand to change in income.

#### Types of Income Elasticity of Demand

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#### Factors Affecting Income Elasticity of Demand

Read: Types of Demand

### Cross Elasticity of Demand

Definition: Cross elasticity of demand can be defined as a measure of a proportionate change in the demand for goods as a result of change in the price of related goods.

## What is Elasticity of Supply?

Definition: The elasticity of supply is a measure of change in the quantity supplied of a product in response to a change in its price.

## Determinants of Elasticity of Supply

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Reference
1. D N Dwivedi, Managerial Economics, 8th ed, Vikas Publishing House

2. Petersen, Lewis & Jain, Managerial Economics, 4e, Pearson Education India

3. Brigham, & Pappas, (1972). Managerial economics, 13ed. Hinsdale, Ill.: Dryden Press.

4. Dean, J. (1951). Managerial economics (1st ed.). New York: Prentice-Hall.

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