Microeconomics: Economic Issues and Concepts (Chapter 1)

Chapter 1: Economic Issues and Concepts

1.1 What Is Economics?

Definition of Economics

• Economics is the study of the use of scarce resources to satisfy unlimited human wants.

Resources (Factors of Production)

• Land: Natural endowments (e.g., land, forests, minerals).
• Labour: Mental and physical human effort (e.g., workers, skilled professionals).
• Capital: Tools, machinery, and equipment used in production (e.g., factories, computers, vehicles).
• These three types of resources are collectively known as factors of production.

Goods and Services

• Factors of production are used to produce goods and services.
• Goods: Tangible products (e.g., cars, steel, clothes).
• Services: Intangible tasks or actions (e.g., legal advice, haircuts, education).
• Production: The act of making goods and services.
• Consumption: The act of using goods and services.

Scarcity and Choice

• Scarcity: Resources are limited relative to our unlimited desires. There are not enough resources to produce all the goods and services that people want.
• Scarcity necessitates choice – societies must decide what to produce and what to forgo.

Opportunity Cost

• Making choices always implies a cost.
• Opportunity Cost: The value of the next best alternative that is forgone when one alternative is chosen.
  • Example: Choosing Between Road Repair and New Bicycle Paths
    • Scenario: Susan has $12$ million to spend on two projects: road repairs ($1$ million per km) and new bicycle paths ($0.5$ million per km).
    • Calculation of Opportunity Cost:
      • The opportunity cost of $1$ km of road repairs is $2$ km of new paths ($1$ million / $0.5$ million/km = $2$ km).
      • The opportunity cost of $1$ km of new paths is $0.5$ km of road repairs ($0.5$ million / $1$ million/km = $0.5$ km).
  • Attainability: Points on or inside the budget line (representing the $12$ million budget) are attainable. Points outside are unattainable.
    • For example, repairing $9$ km of roads ($9$ million) and building $6$ km of new paths ($3$ million) uses $12$ million (Point C).
    • Repairing $6$ km of roads ($6$ million) and building $12$ km of new paths ($6$ million) also uses $12$ million (Point B).
    • A point like repairing $9$ km of roads and building $15$ km of new paths would require $16.5$ million, which is unattainable with a $12$ million budget (Point A).
  • Application: The High Opportunity Cost of a University Degree
    • The true cost of a university degree includes more than just out-of-pocket expenses (tuition, books).
    • A significant part of the opportunity cost is the forgone income from a paying job that could have been held instead of attending university.
    • People choose to incur this high cost for various reasons: enjoyment of learning, expected increase in future earnings, or sometimes a miscalculation of the full costs and benefits.

The Production Possibilities Boundary (PPB)

• The Production Possibilities Boundary (PPB) is a curve illustrating the combinations of two goods that can be produced when all resources are fully and efficiently employed.
• It graphically demonstrates:
  • Scarcity: Points outside the boundary (e.g., points e and f before growth, Figure 1-2) are unattainable with current resources and technology.
  • Choice: Points on the boundary (e.g., points a, b, c, d, Figure 1-2) are all attainable, representing efficient allocations. Society must choose which combination to produce.
  • Opportunity Cost: Moving along the boundary from one point to another shows the trade-off. To produce more of one good, less of the other must be produced.
  • Inefficiency: Points inside the boundary (e.g., point d, Figure 1-2) represent an inefficient use of resources, meaning more of both goods could be produced without giving up anything.

Four Key Economic Problems

1. What Is Produced and How?
   • This problem involves resource allocation – deciding which goods are produced and in what quantities.
   • It questions whether certain combinations of goods are