Introduction to Elasticity
•Elasticity of demand measures how quantity
demanded changes in response to changes in
price or other factors.
• Key types: Price Elasticity, Income Elasticity,
and Cross Elasticity.
3.
Types of Elasticityof Demand
• 1. Price Elasticity of Demand (PED)
• 2. Income Elasticity of Demand (YED)
• 3. Cross Elasticity of Demand (XED)
4.
Price Elasticity ofDemand (PED)
• Definition: Measures % change in quantity
demanded to % change in price.
• Formula: PED = % Change in Quantity
Demanded / % Change in Price
• High PED (>1): Elastic | Low PED (<1): Inelastic
| PED = 1: Unitary
Determinants of PED
•1. Availability of substitutes
• 2. Necessity vs. luxury
• 3. Proportion of income spent
• 4. Time period considered
7.
Income Elasticity ofDemand (YED)
• Measures how quantity demanded changes
with income changes.
• YED > 0: Normal goods | YED < 0: Inferior
goods
• Helps in understanding consumer behavior
with rising income.
8.
Cross Elasticity ofDemand (XED)
• Measures how demand of one good changes
with the price of another.
• XED > 0: Substitutes | XED < 0: Complements
• Example: Tea and Coffee (substitutes), Pen and
Ink (complements)
9.
Applications of Elasticity
•1. Business pricing strategies
• 2. Government taxation policy
• 3. Revenue estimation
• 4. Forecasting market reactions
10.
Summary
• Elasticity helpsunderstand consumer
sensitivity to economic changes.
• Useful for pricing, policymaking, and strategic
decisions.
• Includes PED, YED, and XED for different
economic analyses.