Market Structure Analysis Core Knowledge Study Guide
This guide systematically outlines the core characteristics, firm behavior patterns, and welfare effects of mainstream market structures, gradually delving into the decision-making logic of firms in various market environments, ultimately extending to market structure measurement and industrial organization theory, helping learners build a comprehensive framework for market structure analysis.
Perfectly Competitive Market: Equilibrium and Welfare in Ideal Markets
Characteristics and Conditions of a Perfectly Competitive Market
- The core characteristics of a perfectly competitive market: many buyers and sellers, homogeneous products, free entry and exit, perfect information.
- Positioning of Market Participants: Logical Implications of Price Takers (Lack of Pricing Power)
- Real-world analogs of perfect competition markets: Agricultural markets and standardized commodity markets
- The prerequisites for the formation of a perfectly competitive market: free flow of factors, no transaction costs, etc.
Firm's Decision in a Perfectly Competitive Market: Short-Term and Long-Term Equilibrium
- Decisive Logic of Short-Run Equilibrium: Quantity Selection Where Marginal Revenue (MR) Equals Marginal Cost (MC)
- Different States of Short-Run Equilibrium: Profit, Break-even, Loss, Shutdown, Critical Conditions (Relationship Between Price (P) and Average Variable Cost (AVC))
- The Mechanism of Long-Run Equilibrium: Corporate Free Entry and Economic Profits Approaching Zero
- Conditions for long-term equilibrium: MR=MC=AC=LMC=LAC's core logic
- Short-run and Long-run Supply Curves: Differences in Derivation at the Enterprise and Industry Levels
Welfare Analysis of Perfectly Competitive Markets (Efficiency and Fairness)
- The Realization of Pareto Optimality: Efficiency Characteristics of Resource Allocation in Perfectly Competitive Markets
- Maximization of Consumer and Producer Surpluses: Graphical Verification of Optimal Welfare
- Discussion on Equity: Price Equalization and Income Distribution Logic
- Ideal market and reality: Theoretical significance and limitations of perfectly competitive markets
Monopolistic Market: Pricing and Welfare Loss in Non-Competitive Markets
The Causes of the Formation of a Monopoly Market
- Structural Barriers: Economies of Scale (Natural Monopoly), Key Resource Monopolies, Administrative Permits and Patent Protection
- Strategic Barriers: Entry Barriers That Enterprises Actively Construct (e.g., Huge Sunk Costs, Restrictive Pricing)
- Classification of Monopolies: Differences Between Natural Monopolies, Administrative Monopolies, and Economic Monopolies
- Real-world cases of monopolistic markets: Utilities industry, patent-intensive industries
Price Strategies of Monopolistic Enterprises (Single-Price Monopoly, Price Discrimination, etc.)
- Single-Price Monopoly Pricing Logic: Output and Price Determination under the MR=MC Principle
- The core conditions of price discrimination: market segmentation, differences in consumer demand elasticity, no arbitrage opportunity.
- First-degree price discrimination, Second-degree price discrimination, Third-degree price discrimination
- Other Monopoly Pricing Strategies: Bundle Sales and the Application Logic of Two-Part Tariffs
Dead Weight Loss in Monopolistic Markets
- Definition of deadweight loss: total welfare reduction caused by monopoly output being below perfectly competitive output.
- Graphical Representation and Calculation Method of Deadweight Loss: The Area Enclosed by the Demand Curve and the Marginal Cost Curve
- Monopolistic Other Welfare Effects: Transfers from Consumer Surplus to Producer Surplus, and the Social Cost of Rent-Seeking Behavior
- Government Regulatory Measures Against Monopolies: Price Controls, Anti-Monopoly Laws, License-Based Regulations
Monopolistic Competition and Oligopoly: Intermediate Market Structure
Features of Monopolistic Competition Markets and Firm Behavior
- The core characteristics of a monopolistic competitive market: a large number of firms, product differentiation, and free entry and exit.
- Short-term equilibrium: Monopolistic pricing logic (MR=MC)
- Long-run equilibrium: free entry and zero economic profit (P=AC)
- Efficiency Evaluation of Monopolistic Competition Markets: The Welfare Level Between Perfect Competition and Monopoly
Product Differentiation and Non-Price Competition
- Product Differentiation's Connotation: Physical Difference, Service Difference, Brand Difference, Psychological Difference
- Non-price competition's main forms: advertising and promotion, product innovation, after-sales service optimization
- Economic Effects of Non-Price Competition: Increased Market Concentration, Diversification of Consumer Choices, Increased Social Costs.
- The Relationship between Product Differentiation and Market Power: The Impact of the Degree of Differentiation on Pricing Power
Types of oligopoly markets (pure oligopoly, differentiated oligopoly, etc.)
- Pure Oligopoly: Product Homogeneous Oligopoly (such as the steel and cement industries)
- Differentiated Oligopoly Markets: Heterogeneous Products (such as the automotive and appliance industries)
- Other categories: Conspiratorial Oligarchs and Non-Conspiratorial Oligarchs, Dominant Oligarchs and Follower Oligarchs
- Causes of the formation of an oligopoly market: scale economies, high entry barriers, and the trend toward industrial concentration.
Pricing and Output Decisions of Oligopolistic Firms (Cournot, Bertrand, Stackelberg Models, etc.)
- Cournot Model: Simultaneous Decision Equilibrium (Nash Equilibrium)
- Bertrand Model: Equilibrium Outcome of Price Competition (Approaching Perfect Competition under Homogeneous Products)
- Stackelberg model: leader-follower sequential decision-making equilibrium
- Cartel Model: Analysis of Pricing and Output Coordination Logic and Stability in Corporate Collusion
- Comparison of Suitable Scenarios and Assumptions of Different Models
Comprehensive Analysis of Market Structure and Industrial Organization Theory
Market structure and corporate behavior relationship
- Market Structure as a Constraint on Corporate Behavior: Entry Barriers and Competitive Intensity Influence Pricing, Output, and Innovation Decisions
- Reverse effect of corporate behavior on market structure: Strategic behaviors (e.g., mergers and acquisitions, differentiation) on changes in market concentration.
- Comparison Table of Core Differences in Corporate Behavior Under Different Market Structures
- Drivers of the dynamic evolution of market structure: technological progress, policy adjustments, and demand changes.
Measurement and Analysis of Market Concentration
- Core Performance Metrics: Industry Concentration (CRn), Herfindahl-Hirschman Index (HHI)
- Industry Concentration (CRn) Calculation Method and Interpretation: The Sum of the Market Shares of the First n Companies
- The Advantages of the HHI: Considering the Market Share Distribution of All Enterprises
- Limitations and Application Scenarios of Market Concentration Indicators: Adaptability Across Different Industries
Industrial Organization Theory (SCP Paradigm)
- Core Logic of the SCP Paradigm: Structure → Conduct → Performance
- Structural Dimensions: Market Concentration, Product Differentiation, Entry Barriers, etc.
- Behavioral Dimension: Pricing Strategy, Advertising, Innovation, and Merger and Acquisition Strategies
- Performance dimensions: Resource allocation efficiency, Production efficiency, Profit margin, Social welfare
- The Development and Controversy of the SCP Paradigm: Limitations of Traditional Paradigms and the Expansion of New Industrial Organization Theory