Introduction to Economics and the Production Possibilities Frontier

Economics: Defined as the science of scarcity. It is the study of how individuals and societies manage the reality that human wants are greater than the limited resources available to satisfy those wants.
The Scarcity Condition: Economics exists because of the confrontation between infinite wants and finite resources.

Resources: These are defined as the inputs or factors of production used to produce goods and services.
Resource Categories:
- Land: Includes all natural resources. Specific examples provide in the text include minerals, forests, water, oil, wood, air, and unimproved land.
- Labour: Refers to the physical and mental talents that individuals contribute to the production process. An example included is the person who builds houses.
- Capital: Refers to produced goods that are used as inputs for further production. Examples include:
  - Factories
  - Machineries
  - Tools
  - Computers
  - Buildings
- Entrepreneurship: The specific talent possessed by some individuals for organizing the resources of land, labor, and capital to produce goods. Entrepreneurs seek new business opportunities and develop innovative ways of doing things.

Positive Economics: The study of "what is" in economics.
- It deals with cause-and-effect relationships that are objective and can be tested.
- Example: Analyzing the specific effect that a cut in income taxes has on the unemployment rate (Cause: Tax Cut; Effect: Change in Unemployment).
Normative Economics: The study of "what should be" in economics.
- It deals with value judgments and opinions that cannot be tested or proven true/false.
- Example: Stating that "Income taxes should be cut because the income tax burden on many taxpayers is currently high." This represents a judgment and opinion rather than a testable causal link.

Microeconomics: The branch of economics that examines human behavior and choices as they relate to relatively small units. These units include:
- An individual
- A firm
- An industry
- A single market
- Microeconomic Statements/Examples:
  - If the price of good A increases, the consumer tends to buy less of good A.
  - Firm ABC decided to produce at $15\,\text{units}$ of good B in order to maximize profit.
  - The advertising campaign of the Honda company resulted in hurting the sales of Proton.
Macroeconomics: The branch of economics that deals with human behavior and choices as they relate to highly aggregate markets or the entire economy (e.g., the market for all goods and services).
- Macroeconomic Statements/Examples:
  - Lowering market interest rates can stimulate economic growth by encouraging borrowing and spending.
  - A decrease in government spending may result in reduced economic activity.
  - A depreciation of the national currency can boost a country's exports.

Scarcity: A condition where our infinite wants for goods collide with finite resources. We want certain goods, but there are simply not enough resources to provide everything desired.
Opportunity Cost: Defined as the most highly valued opportunity or alternative that is forfeited when a choice is made.
- Example: The opportunity cost of a student reading a textbook chapter is the value of what they give up. This could be quantified as lost income from a job they could have worked during that time, a lost hour of watching television, or a forgone nap.

Definition: The PPF represents the possible combinations of two goods that can be produced during a specific span of time under the conditions of a given state of technology and the full employment of available resources.
Straight-Line PPF: If the PPF is a straight line, it implies that the opportunity cost between the two goods is constant.
- Constant Opportunity Cost Example: Moving from Point A to Point B on the frontier might involve "letting go" of $1\,\text{book}$ (dropping from $4\,\text{books}$ to $3\,\text{books}$ ) to produce $1\,\text{shirt}$ . In this scenario, the opportunity cost of $1\,\text{book}$ is exactly $1\,\text{shirt}$ .

Economic Growth: Defined as an increase in the production capabilities of an economy. In the PPF framework, this is illustrated by the frontier shifting outward (e.g., from $PPF_1$ to $PPF_2$ ).
Increase in Resources: Refers to the ability to produce more output because the quantity of available resources has increased.
Advance in Technology: Often associated with the consequences of "Industrial Revolution 4.0," technological advancement refers to:
- The ability to produce more output with a fixed (unchanged) amount of resources.
- The ability to produce the same level of output using fewer resources.