Study guide: Foundations of Economics

📋 Course Outline

1. Course Objectives and Organisation
2. Economics, Choice and Scarcity
3. Microeconomic and Macroeconomic Analysis
4. Opportunity Cost and Rational Choice
5. Marginal Decisions and Incentives
6. Economic Models and Scientific Method
7. Positive and Normative Economics
8. Markets, Efficiency and Self-Interest

📖 1. Course Objectives and Organisation

📝 Essential Points

• The course aims to teach economic fundamentals, identify which tools to use, and analyse economic information in the business world.

📖 2. Economics, Choice and Scarcity

🔑 Key Concepts & Definitions

• Economics: The social science that studies how individuals make choices under resource constraints and the optimal allocation of resources.
• Factors of production: The human, natural and manufactured resources used to produce goods and services.
• Capital: The sum of the factors of production that had to be brought into play before producing a good or service; its stock is limited and its productivity depends on technology.

★ Must-know

• Economic study is ultimately concerned with scarcity, which occurs when people’s desires exceed what available resources can produce.

Further detail

• Human resources consist of labour, whose available workforce is limited in number and skills.

• Natural resources consist of land and raw materials, both of which are limited.

💡 Memory Hook

Limited resources create scarcity, and scarcity makes choice necessary.

📖 3. Microeconomic and Macroeconomic Analysis

🔑 Key Concepts & Definitions

• Microeconomics: Studies individual components of the economy, including household and business choices and their interactions.
• Macroeconomics: Studies the economy as a whole, including aggregates such as GDP, unemployment and inflation, and choices by the state or central bank.

📝 Essential Points

• The producer is a company whose objective is profit, whose constraint is technology, and whose choices concern inputs.

• The consumer is a household whose objective is utility or satisfaction, whose constraint is its budget, and whose choices concern consumption and the amount of work.

💡 Memory Hook

Micro studies individual choices; macro studies the economy as a whole.

📖 4. Opportunity Cost and Rational Choice

🔑 Key Concepts & Definitions

• Opportunity cost: The value of the best option given up when making a choice.
• Rational choice: Made by comparing costs and benefits.

📝 Essential Points

• In the Mustang example, the $1,000 already spent on repairs is a sunk past expense, while the decision to repair the clutch depends on the additional $600 cost and the resulting difference in sale price.

📖 5. Marginal Decisions and Incentives

🔑 Key Concepts & Definitions

• Marginal cost and benefit: The cost and benefit associated with increasing or abandoning a given level of activity.

★ Must-know

📌 Rational decision-making compares marginal benefits with marginal costs rather than comparing only total benefits and total costs.

Further detail

• Economic choices are influenced by incentives, including tastes and marketing.

📖 6. Economic Models and Scientific Method

🔑 Key Concepts & Definitions

• Induction: The construction of models around general hypotheses about the causes of economic phenomena based on observation.

★ Must-know

• Economists observe economic phenomena, construct models based on hypotheses about their causes, and evaluate those models by the relevance of their explanations and predictions.

Further detail

• Economics is a social science that uses a methodology close to that of the natural sciences but requires a more complex framework of hypotheses than chemistry.

💡 Memory Hook

Observe, build a model, then assess its explanations and predictions.

📖 7. Positive and Normative Economics

🔑 Key Concepts & Definitions

• Positive economics: Describes and explains the behaviour and functioning of systems objectively, using precise, measurable facts without judging them.
• Normative economics: Evaluates the consequences of behaviour as good or bad and prescribes actions based on values.

📝 Essential Points

• Economists build and test economic models to explain the economic world.

💡 Memory Hook

Positive asks what people do; normative asks what they should do.

📖 8. Markets, Efficiency and Self-Interest

🔑 Key Concepts & Definitions

• Efficiency: Achieving the greatest possible satisfaction given the constraints, with minimum waste.
• Homo economicus: A model of a rational individual whose choices are driven by self-interest.
• Aggregate demand: The total amount of expenditure recorded in an economy.
• Aggregate supply: The total national production of goods and services.

★ Must-know

• In the goods market, buyers buy when the price is below their willingness to pay, while sellers sell when the price is above their production cost.

Further detail

• Prices provide the information needed to coordinate buyers and sellers in the goods market.

• The efficiency of the goods market does not require people to like one another or take account of one another’s behaviour.

• Macroeconomic policy focuses on balancing aggregate supply and aggregate demand by favouring supply, demand, or both.

💡 Memory Hook

Prices coordinate buyers and sellers pursuing their own interests, supporting market efficiency.

📊 Synthesis Tables

Microeconomics and Macroeconomics