elasticity of demand Flashcards
elasticity of demand
measure of how the QD of a product changes owing to a change in a factor that affects demand, such as price or income
consumer’s real income
money available after the impact of inflation,or higher prices have been accounted for
price elastic demand
occurs when a relatively small change in the price of a product causes a larger% change in QD ped>1
price inelastic demand
a small change in a price of a product causes a smaller change in QD
ped<1
equation for price elasticity of demand
percentage change in quantity demanded/ percentage change in price
if you don’t have the percentage you use this equation
new figure-old figure/ old figure
unitary price elastic
occurs when a given price change of a product leads to the same percentage change in QD
ped=1
price elastic has alot of substitutes just like perfectly price elastic
price inelastic has a lack of substitutes just like perfectly price inelastic
perfectly price elastic demand
demand exists at one price only and any change in price leads to zero demand
ped= infinity
–= direction of diagram
perfectly price inelastic demand
a change in price has no impact on the demand
ped=0
|= direction of diagram line
determinants of price elasticity of demand
- number of closeness of substitutes
- proportion of income spent on the product
- degree of necessity
- time period under consideration