Elasticity (L12) Flashcards
Price elasticity of demand
Measures the responsiveness of demand given a change in price
When is demand price elastic?
When a change in price causes a proportionately larger change in demand.
When is demand price in elastic
When a change in price causes a proportionately smaller change in demand
Number of substitutes
The more substitutes a product has, the greater the degree of consumer switching will be when there is a price change (more substitutes more elastic demand that a product has)
Necessity/luxury
If a product is considered a necessity demand is more likely to be price inelastic as people require the product no matter what the price is.
Addictive ness
The more addictive a product is the more price inelastic demand will be
Time
Time gives consumers the opportunity to find alternatives. Greater time period= more price elastic demand is
Proportion of income spent on the product
The greater the proportion of income spent on the product the less able consumers will be to afford any price increases so the greater the proportion of income spent on a product the more price elastic demand will be
Problem: assumptions about the behaviour of economic agents must be made to create economic models. What assumptions should economists make?
Solution: assumptions can be made with deduction (classical, neoclassical) or induction (behavioural,Keynesian school) collect evidence
Classical and neoclassical economics, decision makers are…
Assumed to be rational
Price inelastic
Demand doesn’t change as much even if prices increase, because supply doesn’t increase
Price elasticity of demand
Percentage change in quantity demand / percentage change in price
Elastic
1
Inelastic
0
Unitary
1