Market Failures & Policy
Where markets break and what to do about it — externalities, information, and government intervention.
72 articles
FeaturedEnvironmental 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.
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Deep Dives
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.
The Tragedy of the Commons: How Individual Rationality Destroys Shared Resources
One of the richest fishing grounds on Earth went functionally extinct. The cod collapse is the tragedy of the commons in real life, and a guide to fixing it.
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.
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.
The Market Provides Too Little of the Best Things: The Economics of Positive Externalities
A positive externality is a benefit your choice gives others for free. Because you can't bill them, the market underproduces it — vaccines, education, research.
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.
Deadweight Loss: The Hidden Cost of Monopoly That Never Shows Up on a Balance Sheet
Deadweight loss is value that simply vanishes when a monopoly restricts output — trades that would benefit everyone but never happen. Here is how to see it.
Government vs. Market Provision: When Public Supply Makes Sense and When It Doesn't
Government or market? The honest answer weighs a real market failure against real government failure. A framework that does both, step by step.
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.
Quick Answers
The Coase Theorem: When Private Bargaining Solves Externalities
The Coase Theorem states that when property rights are clearly defined and transaction costs are zero, private bargaining will produce an efficient outcome…
Read more →The Tragedy of the Commons: When Shared Resources Are Destroyed
The tragedy of the commons describes how rational individual behavior destroys a shared resource.
Read more →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 →Price Floor: What Happens When Government Sets a Minimum Price
A price floor is a legal minimum price above the market equilibrium. It protects sellers from very low prices but creates surpluses — excess supply that…
Read more →Cap-and-Trade: Using Markets to Cut Pollution Efficiently
Cap-and-trade sets a total limit on emissions, distributes tradeable permits up to that cap, and lets firms buy and sell permits based on their individual…
Read more →Allocative vs. Productive Efficiency: Two Ways Markets Can Get It Right
Allocative efficiency means resources go to their highest-valued uses (P = MC). Productive efficiency means goods are produced at minimum cost.
Read more →Moral Hazard: When Insurance Changes Behavior
Moral hazard occurs when one party takes more risk because another party bears the cost of that risk.
Read more →Import Quota: The Quantity Limit on Foreign Goods
An import quota is a legal limit on the quantity of a foreign good that can be imported. Like a tariff, it raises domestic prices and protects domestic…
Read more →Externality: The Cost or Benefit That Markets Forget to Price
An externality is an uncompensated cost or benefit that a market transaction imposes on third parties.
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