Year 11 Economics Exam Notes
The Economic Problem
Scarcity:
Fundamental economic issue of unlimited wants versus limited resources.
Requires societies to allocate finite resources to meet competing wants. Scarcity forces economic agents (individuals, firms, governments) to make choices about how to allocate resources efficiently.
Scarcity is not the same as poverty. Scarcity affects everyone, while poverty refers to a lack of sufficient resources to meet basic needs.
Choice:
Individuals, businesses, and governments must make choices due to scarcity. Decision-making involves assessing alternatives and selecting the option that maximizes utility or profit.
Economic models assume rational choice, where individuals aim to maximize their well-being.
Example: A consumer chooses between buying a new phone or saving the money. A business decides whether to invest in new equipment or hire more employees.
Opportunity Cost:
Value of the next best alternative foregone when making a choice. It's what you give up when you choose something else.
Central to economic reasoning and decision-making. Opportunity cost helps in evaluating the true cost of a decision, including not only the monetary cost but also the value of the next best alternative.
Opportunity costs can be explicit (direct monetary costs) or implicit (indirect, non-monetary costs).
Example: The opportunity cost of attending university is the income you could have earned by working instead.
The Basic Economic Problem
Arises due to limited resources (land, labour, capital, enterprise) and unlimited wants. This fundamental imbalance necessitates economic systems to allocate resources efficiently.
Decisions must be made regarding:
What and how much to produce?
Deciding which goods/services to produce and in what quantities. This involves considering consumer demand, resource availability, and production costs.
How to produce?
Determining the most efficient production methods. This involves choosing the mix of factors of production (land, labor, capital) that minimizes costs and maximizes output.
For whom to produce?
How goods/services are distributed among individuals/groups. This involves considering income distribution, social welfare, and market mechanisms.
Trade-offs: Related to opportunity cost, these are the alternatives that we give up when making a choice. Societies constantly face trade-offs in deciding how to allocate scarce resources.
Important Economic Terms
Needs vs. Wants:
Needs: Essential for survival (food, shelter, clothing). Meeting needs ensures basic human survival and well-being.
Wants: Non-essential but desired. Wants are unlimited and reflect individual preferences and cultural influences.
Competitive Wants:
Wants that compete for satisfaction with limited resources. Satisfying one want means foregoing the satisfaction of another.
Complementary Wants:
Wants consumed together (e.g., printer and ink, car and fuel). The satisfaction of one want enhances the satisfaction of the other.
Recurrent Wants:
Wants satisfied repeatedly (e.g., food, fuel, regular haircuts). These wants are ongoing and require continuous resource allocation.
Factors of Production & Remuneration
Land:
All natural resources (e.g., water, minerals, forests, agricultural land). Land includes both renewable and non-renewable resources.
Remuneration: Rent. Landowners receive rent for the use of their land.
Labour:
Human effort and skills (physical and intellectual). Labor includes all types of work, from unskilled to highly skilled.
Remuneration: Wages. Workers receive wages for their labor services.
Capital:
Human-made goods used in production (e.g., machinery, equipment, buildings). Capital goods enhance productivity and enable the production of other goods and services.
Remuneration: Interest. Owners of capital receive interest for the use of their capital.
Enterprise:
Entrepreneurial skill to manage other factors (organizing resources, taking risks, innovating). Entrepreneurs play a crucial role in driving economic growth and creating new businesses.
Remuneration: Profit. Entrepreneurs receive profit for their entrepreneurial efforts.
Linking Factors of Production to Income: Each factor of production earns income: land earns rent, labor earns wages, capital earns interest, and enterprise earns profit.
Economic Systems
Market Economy (Capitalism):
Decisions made through market forces, minimal government intervention. Resource allocation is determined by supply and demand. Prices act as signals to guide production and consumption.
High consumer sovereignty. Consumers have significant influence over what is produced through their purchasing decisions.
Capitalist Market Economy: A market economy where private individuals and businesses own the factors of production.
Perfect Competition: A market structure where many firms sell identical products, and no single firm has the market power to influence prices.
Planned/Command Economy (Socialism):
Government makes all economic decisions. The government controls the means of production and determines what, how, and for whom to produce.
Limited consumer choice. Consumers have little say in what goods and services are available.
Socialist/Command Economy: An economic system where the government owns and controls the factors of production and makes all economic decisions.
Socialist/Market Economy: A mixed economy that combines elements of both socialism and market capitalism.
Mixed Economy:
Blend of market and planned economies. Most modern economies are mixed, with varying degrees of government intervention.
Australia is an example. Australia has a market-based economy with government involvement in areas such as healthcare, education, and social welfare.
Mixed Market Economy: An economy that combines elements of both market capitalism and government intervention.
Modified Market Economy: A market economy where the government intervenes to correct market failures or achieve social goals.
Subsistence Economy:
Goods produced for personal use, not trade. Production is typically small-scale and focused on meeting basic needs.
Production Possibility Curve (PPC)
Illustrates maximum output combinations of two goods with efficient resource use. The PPC shows the trade-offs involved in allocating resources between different goods.
Concepts illustrated are scarcity, choice, opportunity cost, and trade-offs.
Assumptions of the PPC:
Fixed resources
Fixed technology
Full employment of resources
Production of only two goods
Efficiency:
Technical/Productive Efficiency: Producing goods and services at the lowest possible cost.
Allocative Efficiency: Allocating resources to produce the goods and services that society values most.
On the curve:
Efficient resource use. Points on the curve represent maximum output levels given available resources and technology.
Inside the curve:
Underutilisation of resources (e.g., unemployment, idle capital). Points inside the curve indicate that resources are not being fully utilized.
Outside the curve:
Unattainable with current resources. Points outside the curve represent output levels that cannot be achieved with the current level of resources and technology.
Shifts in the PPC:
Reflect changes in resources, technology, education, or health. An outward shift indicates economic growth, while an inward shift indicates a decline in productive capacity.
Economic Growth: An increase in the economy's capacity to produce goods and services, usually measured by the percentage change in real GDP.
Illustrates:
Scarcity, choice, opportunity cost, trade-offs, economic growth. The PPC visually demonstrates the trade-offs and opportunity costs associated with allocating resources.
Economic Flows
Circular Flow of Income Model
Represents flow of resources, goods/services, and money between economic sectors. The model illustrates how economic activity is interconnected and interdependent.
Efficient Allocation of Resources: An allocation of resources that maximizes society's welfare. In a market economy, this occurs when resources are used to produce the goods and services that consumers value most.
Five-Sector Model:
Households:
Supply factors of production (labor, land, capital, enterprise), receive income (wages, rent, interest, profit). Households consume goods and services produced by firms.
Firms:
Use factors to produce goods/services, pay income. Firms invest in capital goods to increase future production.
Financial Sector:
Savings (leakages) and investment (injections). Financial institutions facilitate the flow of funds between savers and borrowers.
Government:
Collects taxes (leakage), spends on goods/services (injection). Government spending includes infrastructure, healthcare, education, and defense.
Government Intervention: Actions taken by the government to influence the economy, such as taxation, regulation, and spending.
Subsidies: Financial assistance provided by the government to support a particular industry or activity.
Government Assistance: Various forms of support provided by the government, including subsidies, tax breaks, and direct financial aid.
Overseas Sector:
Imports (leakage) and exports (injection). International trade affects the flow of goods, services, and capital.
External Policy: Government policies that affect international trade and investment.
Economic Events Influencing the Model:
An increase in government spending will lead to increased income and output.
Circular Flow of Income Model (Injections and Leakages):
Injections (I + G + X): Investment, government spending, and exports.
Leakages (S + T + M): Savings, taxation, and imports.
Injections and Leakages
Injections (I + G + X):
Stimulate economic activity. Injections increase aggregate demand and lead to higher levels of income and output.
Leakages (S + T + M):
Withdraw income from the economy. Leakages reduce aggregate demand and can lead to lower levels of income and output.
Equilibrium:
Occurs when total injections = total leakages. At equilibrium, the economy is in a stable state with no tendency for income or output to change.
Disequilibrium causes changes in income, output, and employment. Imbalances between injections and leakages lead to fluctuations in economic activity.
Consumption Expenditure: Spending by households on goods and services.
Aggregate Demand (AD)
Formula: AD=C+I+G+(X–M)
C = Consumption (household spending) on goods and services. Factors influencing consumption include income, consumer confidence, and interest rates.
I = Investment (business spending) on capital goods. Factors influencing investment include interest rates, business expectations, and technological change.
G = Government Spending (expenditure on public goods/services). Government spending is influenced by fiscal policy and political priorities.
X-M = Net Exports (exports minus imports). Net exports are influenced by exchange rates, international competitiveness, and global economic conditions.
Disposable Income: The amount of income that households have available to spend or save after paying taxes.
Changes in AD affect the circular flow and overall economic performance.
Increases in AD lead to higher levels of income, output, and employment, while decreases in AD lead to lower levels of economic activity.
Economic Cycle (Business/Trade Cycle)
Shows fluctuations in economic activity over time:
Boom:
High economic activity, low unemployment, inflation risk. During a boom, businesses expand, and wages increase.
Downswing/Contractions:
Slowing growth, rising unemployment. During a downswing, consumer confidence declines, and businesses reduce investment.
Trough/Recession:
Negative growth, high unemployment. During a recession, many businesses may fail, and poverty rates may increase.
Upswing/Recovery:
Economic improvement, falling unemployment. During a recovery, government policies may aim to stimulate economic growth and job creation.
Government Stabilisation Tools:
Fiscal Policy:
Adjusting government spending and taxation. Fiscal policy aims to influence aggregate demand and stabilize the economy.
Deficit budget: Stimulates economy. A deficit budget involves the government spending more than it collects in taxes.
Surplus budget: Reduces inflation. A surplus budget involves the government collecting more in taxes than it spends.
Balanced Surplus or Deficit Budgets: A balanced budget occurs when government revenue equals government spending. A surplus budget occurs when government revenue exceeds government spending. A deficit budget occurs when government spending exceeds government revenue.
Monetary Policy:
Managed by RBA, adjusting the cash rate. Monetary policy aims to control inflation and promote economic growth.
Lower interest rates → more borrowing/spending. Lower interest rates reduce borrowing costs for consumers and businesses.
Higher rates → less borrowing/spending. Higher interest rates increase borrowing costs and can help to cool down an overheating economy.
Interest rates changes and their effects:
Affects investment decisions. Lower rates encourage borrowing and investment.
Affects savings decisions. Higher rates encourage saving, lower rates encourage spending.
Affects exchange rates and international capital flows.
Affects of Increase or Decrease in Money Supply: An increase in the money supply can lead to lower interest rates and increased economic activity. A decrease in the money supply can lead to higher interest rates and decreased economic activity.
Increase in Fluctuation of Interest Rates: Increased volatility in interest rates can create uncertainty and discourage investment.
Paradox of Thrift
When everyone saves more during a recession, demand falls, leading to lower total savings due to reduced income. The paradox of thrift highlights the potential negative consequences of increased saving during an economic downturn.
Market Forces
Markets and Price Mechanism
Market: Arrangement where buyers and sellers interact to exchange goods/services. Markets can be physical (e.g., a farmers' market) or virtual (e.g., an online marketplace).
Price Mechanism: Uses prices to signal resource allocation. The price mechanism is a key feature of market economies.
High demand → higher prices → increased production. Higher prices incentivize producers to increase supply.
Low demand → lower prices → reduced production. Lower prices incentivize producers to decrease supply.
Consumer Sovereignty: Consumers influence what is produced through their purchases. This indicates that resource allocation is ultimately determined by consumer preferences.
Consumer Sovereignty: Consumers influence production through purchases. Consumer sovereignty ensures that resources are allocated in line with consumer preferences.
Demand
Law of Demand:
As price increases, quantity demanded decreases (ceteris paribus). The law of demand reflects the inverse relationship between price and quantity demanded.
Ceteris Paribus: Assumption that all other factors are held constant. This assumption simplifies the analysis of economic relationships.
Demand Curve:
Downward sloping. The demand curve illustrates the law of demand.
Movements along the curve:
Caused by price changes. A change in price leads to a movement along the demand curve.
Shifts of the curve:
Caused by non-price factors (income, tastes, population, expectations, prices of substitutes/complements). A change in a non-price factor leads to a shift of the entire demand curve.
Supply
Law of Supply:
As price increases, quantity supplied increases. The law of supply reflects the direct relationship between price and quantity supplied.
Supply Curve:
Upward sloping. The supply curve illustrates the law of supply.
Movements along the curve:
Caused by price changes. A change in price leads to a movement along the supply curve.
Shifts of the curve:
Caused by factors like input costs, technology, number of sellers, expectations. A change in these factors leads to a shift of the entire supply curve.
Productivity: The quantity of goods and services produced per unit of input. Higher productivity leads to increased output and economic growth.
Market Equilibrium
Point where quantity demanded = quantity supplied. At equilibrium, there is no tendency for the market price or quantity to change.
Efficient Allocation of Resources: Occurs when resources are used to produce the goods and services that consumers value most.
Disequilibrium:
Surplus: QS > QD → price falls. A surplus occurs when the quantity supplied exceeds the quantity demanded, leading to downward pressure on prices.
Shortage: QD < QS → price rises. A shortage occurs when the quantity demanded exceeds the quantity supplied, leading to upward pressure on prices.
Invisible Hand: Adam Smith's concept of individuals' self-interest leading to societal benefit. The invisible hand suggests that markets can allocate resources efficiently without government intervention.
Elasticity
Price Elasticity of Demand (PED)
Measures the responsiveness of quantity demanded to a change in price. PED helps businesses and policymakers understand how price changes affect consumer behavior.
Formula: PED=% change in price% / change in quantity demanded
Types:
Elastic (>1): Consumers are highly responsive. When demand is elastic, a small change in price leads to a large change in quantity demanded.
Inelastic (<1): Consumers are minimally responsive. When demand is inelastic, a change in price has little impact on quantity demanded.
Unitary (=1): Proportional response. When demand is unitary elastic, a change in price leads to an equal percentage change in quantity demanded.
Determinants of PED
Substitutability:
More substitutes = more elastic. Goods with many substitutes tend to have more elastic demand because consumers can easily switch to alternatives if the price increases.
Necessity vs. Luxury:
Necessities = inelastic, luxuries = elastic. Necessities, like food and medicine, tend to have inelastic demand because people need them regardless of price. Luxuries, like designer clothing or expensive cars, tend to have elastic demand because people can easily forgo them if the price increases.
Proportion of Income:
Higher proportion = more elastic. Goods that make up a large proportion of a consumer's income tend to have more elastic demand because price changes have a significant impact on their budget.
Time:
More time to respond = more elastic. Consumers have more time to adjust their consumption habits, demand tends to become more elastic.
Importance of PED
For Consumers:
Helps predict how price changes will affect budgets. Consumers can use PED to make informed purchasing decisions and manage their spending.
For Businesses:
Affects pricing strategies to maximize revenue.
Economic Indicators
Inflation: A sustained increase in the general price level in an economy.
Consumer Price Index (CPI): A measure of the average change over time in the prices paid by urban consumers for a market basket of consumer goods and services.
Unemployment: The state of being actively seeking work but unable to find it.
GDP (Gross Domestic Product): The total value of goods and services produced in an economy over a specific period.
Economic Growth: An increase in the economy's GDP over time
Government Policies
Monetary Policy: Actions taken by the central bank to manipulate the money supply and credit conditions to stimulate or restrain economic activity.
Interest Rates: The cost of borrowing money, expressed as a percentage. Central banks often use interest rates as a tool to influence economic activity.
Price Stability: A situation where the general price level in an economy remains