Introduction to Economic Principles and Systems

Economics is the study of how humans and societies make decisions in the face of scarcity, which is the imbalance between limited productive resources and unlimited human wants.
Scarcity affects everyone, requiring choices due to limited income and resources such as land, labor, capital, and entrepreneurship.
Fundamental economic questions include: What goods and services should be produced? How should they be produced? Who consumes them?

Land: Natural resources not created by human effort.
Labor: Human effort devoted to a task for which a person is paid.
Capital: Includes physical capital (human-made resources used for production) and human capital (skills and knowledge gained through education and experience).
Entrepreneurship: Individuals who start businesses or bring products to market.
Resource Payments: These include rent for land, wages for labor, interest for capital, and profit for entrepreneurial ability.
Division of Labor: A concept introduced by Adam Smith in The Wealth of Nations ( $1776$ ) where work is split into specialized tasks to increase efficiency and productivity through economies of scale.

Microeconomics: Focuses on individual units within the economy, such as households, businesses, and industries.
Macroeconomics: Studies the economy as a whole, focusing on goals like economic growth, employment levels, and inflation using monetary and fiscal policies.
Economic theories and models are simplified representations used to understand complex real-world issues, often built on the assumption that individuals act in their own self-interest to maximize satisfaction.

Traditional Economy: Based on customs and traditions; typically agrarian and slow to change.
Command Economy: The government owns the factors of production and decides what is produced and the prices charged (e.g., North Korea, Cuba).
Market Economy: Individuals own resources and make decisions based on supply, demand, and the price system (Capitalism).
Mixed Economy: Combines market principles with government regulation; most modern nations, including the United States, use this system.
In the United States, the government manages specific services (the mail system, airports) and enforces regulations like the Sherman Antitrust Act, while most businesses are privately owned.

Factor Market: Where households sell resources (land, labor, capital) to businesses and receive income (wages, rent, interest, profit).
Product Market: Where businesses sell goods and services to households.
Money serves as a medium of exchange, flowing from households to businesses in the product market and back to households in the factor market.

Globalization is the expansion of cultural, political, and economic connections via increased international trade.
Exports: Goods and services sold to other nations.
Imports: Goods and services purchased from other nations.
Gross Domestic Product (GDP): The total market value of all goods and services produced in a nation over a specific time period. For example, in $2011$ , South Korea had an approximate GDP per capita of $\$32,000$ , while North Korea’s was approximately $\$1,500$ .