◆ THE ECONOMY
Market Failures & Policy
Where markets break and what to do about it — externalities, information, and government intervention.
72 articles
FeaturedCarbon Tax: Pricing Greenhouse Gas Emissions Directly
A carbon tax is a per-unit charge on greenhouse gas emissions, designed to make the private cost of fossil fuel use reflect its social cost.
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Deep Dives
◆ COMPETITION & MONOPOLY
Natural Monopoly and Regulation: Should You Let One Firm Win — or Control What It Charges?
Some markets are cheapest served by one firm — water, power lines, pipelines. The hard question isn't whether to allow the monopoly, but how to keep it honest.
◆ INFORMATION ECONOMICS
The Market for Lemons: How Asymmetric Information Unravels Markets
George Akerlof's 'market for lemons' shows how, when buyers cannot tell good from bad, average pricing drives quality out until only the lemons remain.
◆ INFORMATION ECONOMICS
Moral Hazard: When Being Protected Changes How Carefully You Behave
Moral hazard is the change in behavior that happens once you are shielded from risk. It shapes insurance design, bank regulation, and policy fine print.
◆ MARKET FAILURES
Pigovian Taxes and Subsidies: Putting a Price on What the Market Ignores
A Pigovian tax equals the harm a transaction inflicts on third parties. Here is a carbon-tax worked example, line by line, and where the idea gets tricky.
◆ MARKET FAILURES
The Free-Rider Problem: Why Public Goods Don't Fund Themselves
If you benefit whether or not you pay, why pay? That thought, multiplied across everyone, is why public goods go unfunded, and a model for fixing it.
◆ INFORMATION ECONOMICS
Signaling and Screening: How Markets Overcome Information Gaps
Signaling and screening are the two ways markets move hidden information across an information gap — one led by the informed side, one by the uninformed side.
◆ GOVERNMENT INTERVENTION
What Happens When You Cap Prices Below Equilibrium: Rent Control and Shortages
A price cap below the market-clearing price doesn't make a good cheaper for everyone — it creates a shortage. Rent control is the textbook case.
◆ GOVERNMENT INTERVENTION
How Taxes Actually Work on the Economy — From Your Paycheck to the Policy Debate
Taxes don't just move money — they change behavior, split burdens in ways Congress didn't intend, and create efficiency costs that grow faster than the rates.
◆ INFORMATION ECONOMICS
The Principal-Agent Problem: When the Person You Hired Has Different Goals
The principal-agent problem arises when you hire someone to act for you but cannot fully observe what they do — and their interests don't match yours.
Quick Answers
Adverse Selection: How Information Gaps Attract the Wrong Participants
Adverse selection occurs when one party's inability to observe another's characteristics before a transaction causes the worse-than-average participants to…
Read more →Equity vs. Efficiency: Two Goals That Often Conflict
Economic equity is the fairness or justice of economic outcomes and processes. Efficiency maximizes total value; equity addresses its distribution.
Read more →Antitrust: The Policy Lever for Protecting Competition
Antitrust law prevents firms from monopolizing markets, fixing prices, or merging in ways that substantially reduce competition.
Read more →The Free-Rider Problem: Why Public Goods Are Underprovided
The free-rider problem occurs when individuals can enjoy a benefit without paying for it, creating an incentive to let others bear the cost.
Read more →Unintended Consequences: Why Policies Often Produce Surprises
Unintended consequences are outcomes of policies or interventions that were not anticipated or desired by their designers.
Read more →Market Failure: When Markets Produce the Wrong Outcome
Market failure occurs when a free market fails to allocate resources efficiently on its own.
Read more →Tariff: The Tax That Makes Imports More Expensive
A tariff is a tax on imported goods. It raises import prices, protects domestic producers, generates government revenue — and reduces total welfare by…
Read more →The Principal-Agent Problem: When Your Representative Has Different Interests
The principal-agent problem arises when one party (the principal) hires another (the agent) to act on their behalf, but the agent has different interests and…
Read more →Monopoly: When One Seller Controls the Market
A monopoly is a market with a single seller who faces no close substitutes and sets price above marginal cost.
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