other elasticities lesson 3.48. cross-price elasticity of demand the demand for a good is often...
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Other Elasticities
Lesson 3.48
Cross-Price Elasticity of Demand
• The Demand for a good is often affected by the demand for other products, such as substitutes and complimentary items.– Substitute goods will have a positive cross-price elasticity (Price of B
goes up, Demand for A goes up)– Complimentary goods will have a negative cross-price elasticity (Price
of B goes up, Demand for A goes down)
• Cross-Price Elasticity =– %Change in Demand A/%Change in Price B
Income Elasticity of Demand• How changes in Income affect the demand for a good.
– When the Income elasticity is positive, and the good is a normal good, quantity demanded will increase as income increases.
– When Income Elasticity is negative, demand decreases for inferior goods as income increases.
• Income-Elastic– Demand will grow faster than income
• Income-Inelastic– Demand will grow, but slower that income
• %Change in Quantity Demanded/%Change in Income
Price Elasticity of Supply
• The price-elasticity of supply is defined the same as with demand.– Price Elasticity of Supply = %Change in quantity supplied/%Change in
price– Perfectly elastic and perfectly inelastic extremes
• What factors determine price elasticity of supply?– Availability of inputs– Time
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