Elasticity Flashcards
4 types of elasticity
- Ped
- Pes
- Yed
- Xed
How to work out cross elasticity of demand
% change QD of good A / % change Price of good B
How to work out price elasticity of demand
% change QD / % change Price
Range for being an inelastic good
> 1
Determinants for elasticity of demand
- Time period
- Number of substitutes
- Luxury or necessity
- Habit forming
- Proportion of income
How to work out price elasticity of supply
% change QS / % change Price
Determinants of elasticity of supply
- 4 factors of production
- Time
- Spare capacity
- Spare stock and components
How to work out income elasticity of demand
% change D / % change Income
Normal good
Demand rises as income rises >0
Inferior good
Demand falls as income rises <0
Luxury good
2+ (sometimes 1+)
Do substitutes give a positive or negative answer
Positive
Do complements give a positive or negative answer
Negative
1 Unitary elastic
% change quantity demand same as % change in price
0 perfectly inelastic
% change quantity demand stays the same dosent matter what the change in price