Relative Scarcity
The basic economic problem is that people have unlimited wants but limited resources.
Trade Off
The exchange of one thing for another
Perfect Market
A market structure characterised by many buyers and sellers, homogeneous products, no barriers to entry/exit, and perfect information
The Law of Demand
States that as the price of a good or service increases, the quantity demanded decreases. The opposite is also true.
Non-Price Demand Factors
Change in Price of Substitutes
Change in Interest Rates
Change in Disposable Income
Effect of Successful Advertising
The Law of Supply
States that as the price of a good or service increases, the quantity supplied increases. The opposite is also true
Non-Price Supply Factors
Change in the Cost of Production
Technological Change
Productivity Change
Climatic Conditions
Increase in Number of Suppliers
Price Elasticity of Demand (PED):
The responsiveness of quantity demanded to a change in price.
High PED (elastic):
Quantity demanded changes significantly with price
Low PED (inelastic):
Quantity demanded changes little with price
Factors influencing PED
Availability of substitutes
Necessity vs luxury
Proportion of income
Time since price change
Factors influencing PES
Time to produce
Spare capacity
Durability of goods
Availability of resources
Price Elasticity of Supply (PES):
The responsiveness of quantity supplied to a change in price
High PES (elastic):
Quantity supplied changes significantly with price
Low PES (inelastic):
Quantity supplied changes little with price
Market Failure
When the free market fails to allocate resources efficiently or in a way that maximises national living standards.
Government Intervention
When the government takes action to correct market failure and improve the allocation of resources.
Government Failure
When government intervention in a market causes a less efficient allocation of resources than the market outcome.
Public Good
A good that is non-rivalrous (one person’s use doesn’t reduce availability for others) and non-excludable (people cannot be excluded from using it).
Common Access Resource
Natural resources that are non-excludable but rivalrous, making them vulnerable to overuse or depletion (e.g. fish stocks, forests)
Free Rider Problem
Occurs when individuals benefit from a good or service without contributing to its cost, often associated with public goods
Positive Externality
A benefit from an economic activity that is received by third parties, not reflected in the market price (e.g. education, vaccination).
Negative Externality
A cost from an economic activity that is imposed on third parties, not reflected in the market price (e.g. pollution, second-hand smoke).
Indirect Tax
A tax placed on the sale of goods or services, collected by sellers and passed on to the consumer (e.g. GST, excise on fuel).