Elasticity of Demand — Revision Notes
ICSE · Class 10 · Economic Application
Elasticity of Demand revision notes for ICSE Class 10 Economic Application: 4 topics in quick points. Includes Meaning of Elasticity of Demand, Methods.
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Key Topics to Revise
1. Meaning of Elasticity of Demand
- Price elasticity of demand measures the amount of change in quantity demanded in response to change in price.
- Elasticity of demand is a quantitative concept, not a qualitative one.
- The greater the response of demand to price change, the greater the elasticity.
2. Methods of Measuring Price Elasticity of Demand
- There are three methods of measuring price elasticity of demand: Percentage Method, Expenditure Method, and Geometrical Method.
- The percentage method gives the exact numerical value of elasticity.
- The expenditure method uses total expenditure or total outlay.
3. Degrees or Kinds of Price Elasticity of Demand
- There are five kinds of price elasticity of demand.
- Perfectly inelastic demand has Ed = 0 and its demand curve is parallel to the Y-axis.
- Inelastic demand has Ed < 1.
4. Total Expenditure or Outlay Method
- Total expenditure is the product of price and quantity.
- When price and total expenditure are inversely related, demand is elastic.
- When price and total expenditure are directly related, demand is inelastic.
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