Microeconomics

What microeconomics studies

Major topics:

• Supply and demand — how prices form for individual goods.
• Consumer choice — how individuals allocate budgets.
• Producer behavior — how firms decide what to produce and at what scale.
• Market structure — perfect competition, monopoly, oligopoly, monopolistic competition.
• Game theory — strategic interactions between agents.
• Externalities — when costs or benefits affect parties beyond the transaction.
• Public goods — goods that markets struggle to provide efficiently.
• Information asymmetries — when buyers and sellers have different information.

Micro vs. macro

The distinction:

• Microeconomics — studies individual decision-making by households and firms. Specific markets, specific products.
• Macroeconomics — studies aggregate phenomena. Total output, general price levels, system-wide unemployment.

Modern economics uses microeconomic foundations to build macroeconomic models, attempting to explain aggregate patterns through underlying individual behavior.

Foundational concepts

A few central ideas:

• Equilibrium. Prices adjust until supply equals demand at the margin.
• Marginal analysis. Decisions made at the margin (one more, one less) drive equilibrium outcomes.
• Opportunity cost. The next-best alternative is the true cost of any choice.
• Comparative advantage. Trade is mutually beneficial when each party specializes where they have lowest opportunity cost.
• Elasticity. How sensitive demand or supply is to price changes.
• Pareto efficiency. No reallocation can make someone better off without making someone else worse off.

These provide the toolkit for analyzing many specific situations.

Market structure

Different industries have different competitive dynamics:

• Perfect competition — many small firms, identical products, no individual market power. Theoretical ideal; rare in practice.
• Monopoly — single seller. Common with utilities, certain software, sometimes pharma.
• Oligopoly — few sellers; complex strategic interaction. Airlines, telecom, semiconductors.
• Monopolistic competition — many sellers with differentiated products. Restaurants, consumer goods.

Each structure produces different prices, output levels, and welfare outcomes.

Where microeconomics applies

Beyond academic theory:

• Pricing strategy — businesses use micro logic to set prices.
• Antitrust enforcement — regulators evaluate market structure.
• Resource allocation — efficiency analysis of public spending and policy.
• Behavioral analysis — combining micro foundations with psychology.
• Mechanism design — designing rules and incentives to achieve specific outcomes.
• Market regulation — applying micro theory to specific markets.

Behavioral economics

A subfield emphasizing psychological factors:

• Loss aversion — people feel losses more than gains.
• Status quo bias — people prefer not to change.
• Framing effects — same option presented differently produces different choices.
• Anchoring — initial information disproportionately affects subsequent judgments.
• Hyperbolic discounting — people discount near-term gains more heavily than rational models predict.

Behavioral economics has reshaped policy (default opt-ins for retirement saving, simplified disclosures, "nudges") based on insights about real human decision-making rather than idealized rational actors.

Micro and asset prices

Several connections to financial markets:

• Auction theory — how IPOs, treasury auctions, ad auctions work.
• Market microstructure — how price formation happens in actual markets, including bid-ask spreads, order types, and information asymmetries.
• Pricing of options — based on micro insights about uncertainty and arbitrage.
• Investor behavior — behavioral micro concepts apply to retail and institutional investing patterns.

In policy

Microeconomic analysis informs many policy decisions:

• Tax policy — supply-and-demand effects of taxes on labor, investment, consumption.
• Subsidy effects — welfare implications of various subsidy programs.
• Externality correction — carbon taxes, cap-and-trade, environmental regulation.
• Market design — kidney exchange, school choice, spectrum auctions.

Some policy domains (auction design, mechanism design for matching markets) draw heavily on micro theory.

Major schools of micro thought

A few:

• Neoclassical — dominant academic framework; rational utility-maximizing agents.
• Behavioral — incorporates psychology and bounded rationality.
• Austrian — emphasizes individual subjective values; skeptical of mathematical formalism.
• Game-theoretic — uses strategic-interaction frameworks.
• Empirical / experimental — emphasizes evidence-based testing.

Modern academic micro typically combines neoclassical foundations with behavioral and empirical refinement.

What individuals should know

For most personal finance, micro affects practical decisions:

• Pricing and quality — understanding why prices are what they are.
• Strategic considerations — game theory in negotiations and competitive situations.
• Behavioral self-awareness — recognizing your own biases.
• Public-policy effects — understanding how taxes, subsidies, and regulations affect daily life.

Micro is foundational economic literacy. Even modest familiarity with concepts like supply-demand, opportunity cost, and elasticity makes economic news and policy debates more comprehensible.

Crypto and microeconomics

Several crypto-specific applications:

• Token incentive design — applying mechanism design and game theory.
• AMM pricing — based on micro auction-theoretic concepts.
• MEV economics — strategic interactions between block proposers, searchers, and users.
• Governance design — voting mechanisms applied to DAO operation.
• Stablecoin mechanism design — algorithmic stability through incentive engineering.

The "tokenomics" frame is essentially applied microeconomics — designing incentive systems to produce desired collective behavior.

In the broader economy

Micro provides the language for thinking about:

• Markets — how they work, when they fail, when they need regulation.
• Firms — internal organization, scaling, strategic interactions.
• Prices — what they signal, when they're efficient.
• Trade — domestic and international.
• Individual choice — under uncertainty, with constraints, with various preferences.

The discipline isn't perfect — significant areas of disagreement and limitations exist — but it provides one of the most useful general frameworks for thinking about economic decisions and outcomes.