60 Essential Economic Principles and Concepts
1. Ten Principles of Economics
Explanation: Economics is the study of how people make choices because resources (money, time, etc.) are limited. The ten principles are basic rules: 1) people face trade-offs, 2) cost is what you give up, 3) rational people think at the margin, 4) people respond to incentives, 5) trade helps everyone, 6) markets usually work well, 7) government can help sometimes, 8) living standards depend on production, 9) too much money causes inflation, 10) there is a short-run
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Module 1: Market Structures, Pricing & Monopsony
Market Structures
Market structure defines the competitive environment in which firms operate, determining pricing, output, and profit potential.
- Perfect Competition: Many firms, identical products, free entry, price takers, P = MC, markup = 0, zero long-run profit. HR focus: efficiency, limited wage flexibility.
- Monopolistic Competition: Many firms, differentiated products, low entry barriers, P > MC, small short-run profits, excess capacity.
Core Principles of Economics: Scarcity, Markets, and Trade
1. Core Economic Concepts
Scarcity: Wants > Resources → Choice
2. Economics Defined
The study of choices under scarcity and incentives.
3. Micro vs. Macro
- Micro: Individuals and firms.
- Macro: The whole economy.
4. Main Economic Questions
What, how, and for whom to produce? Balancing self-interest vs. social interest.
5. The Three Fundamental Questions
- What: Goods and quantity.
- How: Production method.
- For Whom: Depends on income.
6. Key Definitions
- Tradeoff: Giving up A for B.
- Opportunity Cost: The value of
Perfectly Competitive Markets: Efficiency and Welfare
Perfectly Competitive Markets and Efficiency
A perfectly competitive market is considered the most efficient because it maximizes social surplus. Efficiency, in this context, is defined by the maximization of total well-being in society.
Five Assumptions of Perfect Competition
For a market to be perfectly competitive, it must meet five criteria:
- Atomicity
- Homogeneity
- Free entry and exit
- Perfect information
- Perfect mobility of production factors
The First Welfare Theorem
This theorem concludes that a perfectly
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1. Perfect Competition: Features and Characteristics
Definition: Perfect competition is a market structure where a large number of buyers and sellers engage in the exchange of homogeneous products at a single uniform price determined by market forces.
Key Features
- Large Number of Participants: No single buyer or seller can influence the market price. Firms are price takers.
- Homogeneous Products: Goods are identical in quality, size, and design; they are perfect substitutes.
- Free Entry and Exit: No barriers
Essential Microeconomic Concepts: Markets and Consumer Theory
1. Perfect Competition vs. Monopoly
Perfect competition and monopoly are two distinct market structures.
Perfect Competition
In perfect competition, there are a large number of buyers and sellers. Each firm sells a homogeneous product, meaning all goods are identical. Because there are many sellers, no single firm can influence the market price; firms are price takers. Entry and exit are free, and there is perfect knowledge among buyers and sellers.
Monopoly
A monopoly is a market where only one seller
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