◆ THE ECONOMY
Market Failures & Policy
Where markets break and what to do about it — externalities, information, and government intervention.
66 articles
◆ THE COVER STORYExternality: The Cost or Benefit That Markets Forget to PriceAn externality is an uncompensated cost or benefit that a market transaction imposes on third parties.Read the breakdown →Deep Dives
◆ 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.
◆ 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 Information Gaps Kill Good Markets
Akerlof's 1970 Nobel-winning insight: when buyers can't tell good from bad, average pricing drives quality out until only the lemons remain.
◆ APPLIED ECONOMICS
Environmental Economics: Pricing the Planet and the Policy Math Behind Climate Action
Carbon is the textbook negative externality. The fix is a price — a carbon tax or cap-and-trade — set against the EPA's $190-per-ton social cost of carbon.
◆ 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.
◆ BEHAVIORAL FINANCE
Nudge Theory: Designing Choice Environments to Improve Decisions Without Mandating Them
A nudge changes how choices are presented — not what's allowed — to steer better decisions. Auto-enrollment in 401(k)s is the proof it works.
◆ 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.
◆ MARKET FAILURES
The Four Types of Goods: Why Excludability and Rivalry Determine How Markets Work
Two yes-or-no questions sort every good into one of four boxes. The box decides whether a market, a government, or neither can supply it well.
◆ INFORMATION ECONOMICS
What Is Asymmetric Information? The Economics of Knowing More Than the Other Side
Asymmetric information is when one side of a deal knows more than the other. It shapes insurance, used cars, hiring, and lending, and can break markets.
Quick Answers
Tax Incidence: Who Actually Pays the Tax?
Tax incidence describes the economic burden of a tax — who actually bears the cost, which may differ from who is legally required to pay it.
Read more →Protectionism: Shielding Domestic Industries from Foreign Competition
Protectionism is the use of trade barriers — tariffs, quotas, subsidies, and regulations — to shield domestic industries from foreign competition.
Read more →The Market for Lemons: How Bad Products Drive Out Good Ones
George Akerlof's Market for Lemons model shows how asymmetric information about quality can cause high-quality goods to be driven out of a market entirely,…
Read more →Pigouvian Subsidy: Paying for the Benefits Others Provide
A Pigouvian subsidy is a payment to producers or consumers of goods with positive externalities, set equal to the marginal external benefit.
Read more →Monopsony: When One Buyer Controls the Labor Market
Monopsony is a market with a single buyer of labor — or more broadly, a situation where employers have enough wage-setting power to pay workers less than…
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 →Positive Externality: When Transactions Benefit People Who Didn't Pay
A positive externality is an uncompensated benefit conferred on third parties by a market transaction.
Read more →Subsidy: When Government Picks Up Part of the Tab
A subsidy is a government payment to producers or consumers that lowers the effective price of a good or service.
Read more →Natural Monopoly: When One Firm Really Can Do It Cheaper
A natural monopoly exists when one firm can supply the entire market at lower cost than two or more competing firms.
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