ATAR Year 11 Economics test
Topic 1: Introduction to Markets
1.1 Micro vs. Macroeconomics:
Microeconomics: Focuses on individual economic agents (consumers, firms) and their interactions in specific markets. Examples: A firm's pricing strategy, consumer choice of goods, the market for coffee.
Macroeconomics: Examines the aggregate economy, dealing with broad issues like inflation, unemployment, economic growth, and government policies. Examples: National GDP, the inflation rate, unemployment levels.
1.2 Opportunity Cost & Economic Problem:
Economic Problem: The fundamental issue of scarcity – unlimited wants and needs but limited resources (land, labor, capital). This forces choices.
Opportunity Cost: The value of the next best alternative forgone when a choice is made. It's not just the monetary cost, but the value of what you give up. Example: Choosing to study economics instead of working a part-time job – the opportunity cost is the forgone wages.
1.3 Economic Decision-Making:
Marginal Analysis: Decision-making by comparing the additional benefit (marginal benefit) of an action with the additional cost (marginal cost). Rational decisions are made when MB > MC.
Marginal Benefit (MB): The extra satisfaction or benefit gained from consuming or producing one more unit of a good or service.
Marginal Cost (MC): The extra cost incurred from consuming or producing one more unit of a a good or service.
Net Benefit: Total Benefit - Total Cost. Decisions should aim to maximize net benefit.
1.4 Economic Models: Simplified representations of reality used to analyze and understand complex economic phenomena. They abstract from unnecessary details to focus on key relationships. Examples: PPF, Supply & Demand curves. Models are based on assumptions.
1.5 Production Possibility Frontier (PPF):
Definition: A curve showing the maximum combinations of two goods or services an economy can produce given its available resources and technology, assuming all resources are fully and efficiently employed.
Shape:
Straight-line PPF: Constant opportunity cost – resources are perfectly transferable between the production of the two goods.
Bowed-out PPF (Concave to the origin): Increasing opportunity cost – as more of one good is produced, increasingly more of the other good must be given up. This reflects the fact that resources are not perfectly adaptable.
Points on the PPF: Represent efficient production (all resources used).
Points inside the PPF: Represent inefficient production (unemployment of resources).
Points outside the PPF: Currently unattainable with existing resources and technology.
Shifts of the PPF: Outward shift indicates economic growth (due to increased resources or improved technology).
1.6 Characteristics of a Market Economy:
Definition: An economic system where resource allocation is primarily determined by the interaction of supply and demand in free markets.
Key Characteristics:
Private Property: Individuals and firms own resources and have the right to use them as they see fit.
Free Markets: Prices are determined by the interaction of supply and demand, with minimal government intervention.
Competition: Firms compete with each other for customers, leading to lower prices and better quality.
Price Mechanism: Prices act as signals, allocating resources to their most valued uses.
Consumer Sovereignty: Consumers ultimately decide what goods and services are produced through their purchasing decisions.
Limited Government Intervention: The government plays a limited role, primarily focusing on providing public goods, enforcing contracts, and maintaining stability.
Topic 2: Demand and Supply
Demand:
2.1 Law of Demand: There is an inverse relationship between price and quantity demanded, ceteris paribus (all other things being equal). As price increases, quantity demanded decreases, and vice versa.
2.2 Market Demand: The horizontal summation of all individual demand curves for a particular good or service.
2.3 Movement along Demand Curve: A change in quantity demanded caused by a change in the price of the good itself. Represented by a movement along the demand curve.
2.4 Shifts in Demand: A change in demand caused by a change in a non-price factor. Represented by a shift of the entire demand curve.
2.5 Non-price Factors Affecting Demand:
Income: Normal goods (demand increases with income), Inferior goods (demand decreases with income).
Population: A larger population generally leads to higher demand.
Tastes and Preferences: Changes in consumer preferences can affect demand.
Prices of Related Goods: Substitutes (goods that can be used in place of each other – price increase in one leads to increased demand for the other), Complements (goods that are used together – price increase in one leads to decreased demand for the other).
Expected Future Prices: Expectations of future price increases can lead to increased current demand.
Supply:
2.6 Law of Supply: There is a direct relationship between price and quantity supplied, ceteris paribus. As price increases, quantity supplied increases, and vice versa.
2.7 Market Supply: The horizontal summation of all individual supply curves for a particular good or service.
2.8 Movement along Supply Curve: A change in quantity supplied caused by a change in the price of the good itself. Represented by a movement along the supply curve.
2.9 Shifts in Supply: A change in supply caused by a change in a non-price factor. Represented by a shift of the entire supply curve.
2.10 Non-price Factors Affecting Supply:
Costs of Production: Higher costs of production decrease supply (shift left).
Expected Future Prices: Expectations of future price increases can decrease current supply (firms may hold back goods to sell later).
Number of Suppliers: More suppliers increase market supply.
Technology: Technological advancements usually increase supply (shift right).
Availability of Resources/Supply Chain Disruptions: Shortages of resources or disruptions to the supply chain decrease supply.
Equilibrium:
2.11 Market Equilibrium: The point where the supply and demand curves intersect. At this point, quantity demanded equals quantity supplied.
Market Clearing: The price at which the market clears (equilibrium price).
Shortage: Quantity demanded is greater than quantity supplied (below equilibrium price).
Surplus: Quantity supplied is greater than quantity demanded (above equilibrium price).
2.12 Effects of Changes in D & S:
4-Step Explanation (for single shifts):
Identify the change (Demand or Supply).
Determine the direction of the shift (increase/decrease).
Illustrate the shift on the supply and demand graph.
Analyze the impact on equilibrium price and quantity.
Simultaneous Shifts: When both supply and demand shift, the change in either equilibrium price or quantity (or both) will depend on the relative magnitudes of the shifts. You'll need to analyze each scenario separately.