IGCSE Economics Notes

Economic Definitions and Key Concepts

Opportunity Cost

  • Definition: The cost of choosing one option over the next best alternative. This concept highlights the trade-off made when a choice is made in resource allocation, emphasizing that choosing one resource allocation means foregoing others.

Economic Problems

  • Scarcity: The fundamental economic problem of having unlimited wants, but limited resources available to fulfill those wants.

Market Structures

Oligopoly
Disadvantages
  • Price fixing and collusion among firms can occur, reducing competition.
  • Limited consumer choice due to few firms dominating the market.
Monopoly
Disadvantages
  • Increased prices due to lack of competition, potentially harming consumers.
  • Consumers have no choice in products offered.
  • Minimal incentive to innovate due to lack of competitive pressure.
Advantages
  • Can benefit from economies of scale, potentially leading to lower costs per unit.
  • Ability to invest in research and development (R&D) which can spur innovation in the long run.

Determinants of Supply

  • External factors that impact the quantity of goods a producer is willing and able to supply, including production costs, technology, and market prices.

Economic Systems

Definition

  • Systems employed by countries to address fundamental economic questions such as what to produce, how to produce, and for whom to produce.

Free Market System

  • Producers and consumers dictate production decisions, aiming to maximize profit and consumer satisfaction.

Factors of Production

  1. Land: Natural resources utilized in the production of goods.
  2. Capital: Man-made resources; tools and machinery used in production.
  3. Labour: Human effort offered in the production of goods and services.
  4. Enterprise: The ability to combine other factors of production and take risks to produce goods and services.

Types of Goods

Consumer Goods

  • Definition: Products purchased by consumers to satisfy their wants.
  • Types:
      - Durable Goods: Items that have a prolonged lifespan (e.g., appliances, cars).
      - Non-Durable Goods: Items with a short lifespan (e.g., food, paper products).

Capital Goods

  • Definition: Goods produced by labour that assist in the production of other goods.

Economic Wealth

Private Wealth

  • Goods and services owned by individuals and firms in the private sector.

Social Wealth

  • Goods and services owned by the government serving public interest.

National Wealth

  • The combination of both private and social wealth within a country.

Income Types

  • Earned Income: Money received from work (wages/salaries).
  • Unearned Income: Money generated from assets and investments without the necessity of work.

Production Concepts

Resource Allocation

  • Definition: The distribution of resources in producing a particular good or service.

Average Product

  • Formula: extAverageProduct=extTotalProductextUnitsofLabourext{Average Product} = \frac{ ext{Total Product}}{ ext{Units of Labour}}

Industries Classifications

  1. Primary Industry: Extraction of raw materials (e.g., agriculture).
  2. Secondary Industry: Manufacturing and processing of items into finished products.
  3. Tertiary Industry: Provision of services and retailing of goods.

Specialization

  • Definition: When a country focuses on producing a particular good or service efficiently.

Division of Labour

  • Definition: Splitting the workforce into distinct tasks to increase efficiency and productivity in production.

Production Metrics

Marginal Product

  • Formula: extMarginalProduct=extChangeinTotalProductextChangeinTotalLabourext{Marginal Product} = \frac{ ext{Change in Total Product}}{ ext{Change in Total Labour}}

Law of Diminishing Returns

  • As more units of a factor of production are added, the resulting increases in total output will eventually begin to decline.

Returns to Scale

  1. Increasing Returns to Scale: Doubling inputs results in more than double the output.
  2. Diminishing Returns to Scale: Doubling inputs results in less than double the output.
  3. Constant Returns to Scale: Doubling inputs results in exactly double the output.

Costs of Production

Types of Costs

  • Fixed Costs: Costs that remain constant regardless of output levels.
  • Variable Costs: Costs that fluctuate with the level of output.
  • Total Costs: Combined sum of fixed and variable costs.
  • Average Costs: extAverageCosts=extTotalCostsextOutputext{Average Costs} = \frac{ ext{Total Costs}}{ ext{Output}}

Revenue Metrics

Total Revenue

  • Formula: extTotalRevenue=extPriceofGoodsimesextQuantityofGoodsext{Total Revenue} = ext{Price of Goods} imes ext{Quantity of Goods}

Average Revenue

  • Formula: extAverageRevenue=extTotalRevenueextOutputext{Average Revenue} = \frac{ ext{Total Revenue}}{ ext{Output}}

Break-Even Analysis

  • Break Even Point: The production level at which total costs equal total revenue, indicating no profit or loss.

Depreciation

  • The decrease in value of capital equipment over time necessitating replacement.

Economies and Diseconomies of Scale

Economies of Scale

  • Definition: The decrease in average costs as production increases.
Types
  1. Financial: Access to larger loans or capital through issuing shares.
  2. Marketing: Ability to buy in bulk for discounts.
  3. Technical: Use of specialized machinery and skilled labor to enhance productivity.
  4. Risk-Bearing: Diversification of products to mitigate losses from one particular market.

Diseconomies of Scale

  • Increased average costs due to inefficiencies arising in a large firm.

Business Structures

Types of Businesses

  • Entrepreneur: An individual who combines factors of production to establish a business.
  • Sole Trader: Owned and operated by a single person who bears all profit and risks.
  • Partnerships: Owned by two or more individuals sharing profits and responsibilities.
  • Cooperatives: Owned collectively by workers who share profits and liabilities.
  • Corporation: Owned by shareholders with limited liability.

Multi-National Corporations

  • Companies that operate in multiple countries, with headquarters typically in a single nation.

Financial Concepts

Interest Rate

  • The cost of borrowing money, usually expressed as a percentage.

Venture Capital

  • Funds provided to small, high-risk businesses in exchange for equity.

Stock Market

  • The platform where shares of publicly-owned companies are traded.

Mortgage

  • A specific type of loan secured by real estate, typically repayable over 20-30 years.

Mergers and Acquisitions

  • Merger: The process wherein two companies form a new entity.
  • Horizontal Integration: Merger of companies at the same stage of industry.
  • Vertical Integration: Merger of firms at different stages of production.

Factors Influencing Business Location

  1. Transportation access
  2. Favorable conditions of the location
  3. Cost-effective land
  4. Proximity to labor supply
  5. Accessible raw materials
  6. Accessibility to markets
  7. Availability of power supply
  8. Tradition of business locations.

Demand and Supply Concepts

Demand

  • Definition: The willingness and ability of consumers to purchase goods and services.

Ceteris Paribus

  • Latin phrase meaning 'all other things being equal', utilized in examining one variable at a time.

Types of Goods

  1. Complements: Goods that are used together and have joint demand.
  2. Substitutes: Goods that can replace each other; a price change in one affects the demand for the other oppositely.

Demand Dynamics

  • Contraction of Demand: A decrease in quantity demanded as prices rise.
  • Extension of Demand: An increase in quantity demanded as prices fall.

Supply

  • Definition: The total amount of goods and services that producers are willing to sell at a specific price.

Utility and Consumer Behavior

Utility

  • Refers to the satisfaction or pleasure derived from consuming goods and services.

Law of Diminishing Marginal Utility

  • States that as a consumer acquires more of a commodity, the additional satisfaction from each unit decreases.

Market Equilibrium

Excess Demand

  • Occurs when the quantity demanded exceeds quantity supplied at a given price level.

Excess Supply

  • Occurs when the quantity supplied exceeds quantity demanded at a given price level.

Factors Affecting Demand

  • Weather, income changes, population dynamics, changes in commodity prices, and shifts in fashion or trends.

Equilibrium Price

  • The market price where the quantity demanded equals the quantity supplied.

Market Disequilibrium

  • Occurs when there is a discrepancy between quantity demanded and quantity supplied at a specific price point.

Elasticities of Demand

Price Elasticity of Demand

  • Definition: Measures how demand changes in response to price variations.
  • Formula: extPriceElasticityofDemand=extChangeinQuantityDemandedextPercentageChangeinPriceext{Price Elasticity of Demand} = \frac{ ext{Change in Quantity Demanded}}{ ext{Percentage Change in Price}}

Income Elasticity of Demand (YED)

  • Measures how demand varies with changes in consumer income.
  • Interpretation:
      - If YED > 1, it's a normal good.
      - If YED < 0, it's an inferior good.

Cross Elasticity of Demand (XED)

  • Indicates how the demand for one good is affected by price changes in another good.
  • Interpretation:
      - If XED is positive, goods are substitutes.
      - If XED is negative, goods are complements.

Competition in Markets

Non-Price Competition

  • Strategies employed by firms to increase product demand through means other than price adjustments, primarily through advertising and branding.

Perfect Competition

  • A market structure where firms are productively and allocatively efficient.
Characteristics
  1. Homogeneous products.
  2. Price takers: firms cannot influence prices due to high competition.
  3. Perfect market information.
  4. Freedom of entry and exit from the market.

Monopoly Market Characteristics

Advantages

  • Economies of scale allowing for potentially lower prices.
  • Capability to invest in R&D for innovation and efficiency.

Disadvantages

  • Higher prices and reduced consumer choices.
  • Little to no incentives for innovation due to lack of competitive pressures.

Product Differentiation

  • The creation of variations of products that are similar but created with minor differences, allowing firms to appeal to niche markets.

Normal Profit

  • The minimum level of profit needed for a firm to remain competitive in an industry without attracting new entrants.

Market Structure Overview

Monopoly vs. Perfect Competition

  • Monopoly: Lacks competition, facilitates abnormal profits, serves as price makers, faces high barriers to entry with imperfect information and varied product offerings.

Labor Market

  • Characterized by the demand and supply of labor, focused on salaries and employment conditions.

Productivity

  • Amount of output produced from a specific input of resources.
  • Average Product of Labour: extAverageProductofLabour=extTotalOutputextTotalNumberofEmployeesext{Average Product of Labour} = \frac{ ext{Total Output}}{ ext{Total Number of Employees}}
Trade Unions
  • Organizations that advocate for the interests and rights of workers.
Wage Differentials
  • Variations in salaries based on factors such as skills, job satisfaction, working conditions, and labor market dynamics.