VCE Economics Unit 1 AOS 2: Decision Making in Markets Study Notes

Introduction to Markets

• Definition of a Market: A market exists any time goods and services are bought and sold. It represents activity where exchange occurs. For a market to develop, two conditions must be met:

  • Demand: A willingness and ability to purchase a product.

  • Supply: A willingness and ability to produce or sell a product.

The Law of Demand and the Demand Curve

• Definition of Demand: Demand represents the willingness and ability of buyers or consumers to purchase goods and services.

• The Law of Demand: This law states that as the price of a product increases, the total quantity demanded decreases. Conversely, as the price of a product decreases, the total quantity demanded increases. There is an inverse relationship between price and quantity demanded.

• Theoretical Explanations for the Law of Demand:

  • The Income Effect: When the price of a product falls, the total demand rises because existing customers can afford to increase the quantity they purchase with their current income.

  • The Substitution Effect: When a product becomes relatively cheaper due to a price drop, consumers may turn away from rival products and substitute them with the cheaper product.

• Visualizing the Demand Curve:

  • The y-axis represents Price ($P$).

  • The x-axis represents Quantity ($Q$).

  • The curve slopes downward from left to right, reflecting the inverse relationship.

• Example: Demand for Cherries (kg)

Movements Along vs. Shifts of the Supply Curve

• Movements Along the Curve: Caused only by a change in the price of the product itself.

  • Expansion of Supply: A movement up and to the right along the curve caused by a higher price encouraging higher production.

  • Contraction of Supply: A movement down and to the left along the curve caused by a lower price discouraging production.

• Shifts of the Supply Curve: Caused by non-price factors (changes in production conditions).

  • Rightward Shift: An increase in supply (producers willing to supply more at each price).

  • Leftward Shift: A decrease in supply (producers willing to supply less at each price).

Non-Price Factors Affecting Supply

• Costs of Production: Includes changes in the cost of Capital, Labour, and Materials (natural resources). If production costs increase, profit per unit decreases, reducing the willingness to supply.

• Technological Change: Advances in technology lead to productivity growth, which reduces production costs and increases supply.

• Productivity Growth: Productivity is the efficiency of converting inputs into outputs. Higher productivity reduces average costs, encouraging increased supply.

• Climatic Conditions: Natural disasters or extreme weather can disrupt supply, particularly in agriculture or mining commodity markets.

• Other Disruptions: General interruptions to the production process.

Market Equilibrium and Disequilibrium

• Market Equilibrium: The point where total quantity demanded equals total quantity supplied ($Q_D = Q_S$).

  • Equilibrium Price: The specific price where demand and supply are equal; there is no shortage or surplus.

  • Equilibrium Quantity: The volume sold when the market is at equilibrium price.

• Disequilibrium: Price Too Low: If the price is below equilibrium, demand exceeds supply (Q_D > Q_S), resulting in a shortage. Producers will raise prices to capture more profit and clear the shortage.

• Disequilibrium: Price Too High: If the price is above equilibrium, supply exceeds demand (Q_S > Q_D), resulting in a surplus. Producers will lower prices to eliminate excess stock.

Effects of Changes in Demand and Supply on Equilibrium

• Increase in Demand: Initially creates a shortage. Price increases, leading to a contraction of demand and an expansion of supply. Result: Higher equilibrium price and quantity.

• Decrease in Demand: Initially creates a surplus. Price decreases, leading to an expansion of demand and a contraction of supply. Result: Lower equilibrium price and quantity.

• Increase in Supply: Initially creates a surplus. Price decreases, leading to an expansion of demand and a contraction of supply. Result: Lower equilibrium price and higher equilibrium quantity.

• Decrease in Supply: Initially creates a shortage. Price increases, leading to a contraction of demand and an expansion of supply. Result: Higher equilibrium price and lower equilibrium quantity.

Relative Prices and Resource Allocation

• Relative Price: The price of one good or service relative to another (e.g., the price of kites vs. flags).

• Market Mechanism: The process by which the forces of demand and supply influence relative prices, which then determines how resources (labour and capital) are allocated.

• Producer Motivation: Producers are motivated by higher relative prices, as they indicate higher profitability. Resources will shift toward goods with rising relative prices.

• Consumer Motivation: Consumers are motivated by lower relative prices and will demand more of goods that become relatively cheaper.

• Example: Kites vs. Flags

| Scenario | Year 1 ($) | Year 2 ($) | Increase in Relative Price (%) | | :--- | :--- | :--- | :--- | | Flags | $10$ | $15$ | $50\%$ | | Kites | $10$ | $20$ | $100\%$ |

Result: Because the price of kites increased by $100\%$ compared to flags at $50\%$, the relative price of kites has increased. Suppliers will allocate more resources toward kites.

Market Structures and Market Power

• Market Power: The ability of a business to control or manipulate prices or quantities. High competition equals low market power; low competition equals high market power.

1. Perfect Competition

• Assumptions:

  • Large number of buyers and sellers.

  • Homogenous products (no differentiation).

  • No barriers to entry or exit.

  • Buyers and sellers possess perfect information.

• Outcomes: Businesses are "price takers." Prices are kept at the lowest possible level, and resources are allocated efficiently to maximize consumer satisfaction. However, there may be pressure to use unethical practices (e.g., child labour) to remain competitive.

2. Monopolistic Competition

• Characteristics: Similar to perfect competition (many buyers/sellers, freedom of entry/exit, perfect information) but with product differentiation. Products are not identical, so consumers base decisions on more than just price.

3. Oligopoly

• Characteristics: A small number of businesses dominate the market. High barriers to entry (e.g., setup costs) and often imperfect information (sellers know more than buyers). Examples: banking, airlines, supermarkets.

• Duopoly: A type of oligopoly where only two businesses dominate (e.g., Coles vs. Woolworths, Virgin vs. Qantas).

4. Monopoly

• Characteristics: Only one supplier in the market. The business has maximum market power and acts as a "price maker."

Business Strategies for Profitability

• Marketing Strategies:

  • Advertising.

  • Strategic product positioning (high traffic areas like McDonald's).

  • General promotion (sponsorships, loyalty programs, charitable contributions).

• Cost-Efficiency Strategies:

  • Sourcing high-quality supplies at the lowest cost.

  • Investing in physical capital (efficient technology/machinery).

  • Investing in human capital (employee training).

• Legal/Subtle Strategies:

  • Price Discrimination: Charging different prices for the same product to different consumers (e.g., student/pensioner discounts).

  • Multibranding: Marketing products under distinct brand names to increase market share (e.g., Coca-Cola producing Coke, Fanta, and Sprite; Cadbury producing Flake and Dairy Milk).

Anti-Competitive Strategies and the ACCC

• The Competition and Consumer Act is policed by the Australian Competition and Consumer Commission (ACCC) to eliminate anti-competitive behavior.

• Predatory Pricing: Setting prices extremely low to damage or eliminate a competitor. Once the competitor is gone, the firm raises prices.

  • Example: Coles and Woolworths reducing bread and milk prices to $1.00$ to drive out smaller retailers.

• Cartel Conduct: Two or more businesses join forces to maximize profits rather than competing. Behaviors include:

  • Price Fixing: Agreeing to lift prices in unison.

  • Market Sharing: Dividing customers or areas and agreeing not to "poach" from one another.

  • Bid Rigging: Manipulating the bidding process for contracts (e.g., one company bids extremely high so the other wins).

  • Restricting Supply: Agreeing to limit product availability to drive up market prices.