Market Failures
Externalities, public goods, common resources, the Coase theorem, and Pigovian solutions.
22 articles
FeaturedMarket Failure: When Markets Produce the Wrong Outcome
Market failure occurs when a free market fails to allocate resources efficiently on its own.
Read more →Deep Dives
9 articles
When Markets Get It Wrong: The Four Sources of Market Failure
Markets usually allocate resources well, but four specific defects make them fail predictably: externalities, public goods, market power, and bad information.
Negative Externalities: When Your Transaction Costs Someone Who Wasn't at the Table
A negative externality is a cost a transaction dumps on a third party. Here is the social-vs-private cost wedge, quantified with a polluting factory.
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.
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 Coase Theorem: When Private Bargaining Solves What Regulation Can't
Ronald Coase showed that if property rights are clear and bargaining is cheap, private parties can solve externalities themselves — and where that breaks.
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.
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.
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 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.
Quick Answers
12 termsNegative Externality: When Transactions Impose Costs on Others
A negative externality is an uncompensated cost imposed on third parties by a market transaction.
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 →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 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 →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.
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 →Common Resources: Rival But Non-Excludable
A common resource is rival (one person's use reduces availability for others) but non-excludable (no one can be effectively prevented from using it).
Read more →Property Rights: The Foundation of Market Exchange
Property rights are the legal rights to use, exclude others from, and transfer resources. Secure, well-defined property rights are necessary for markets to…
Read more →Pigouvian Tax: Making Polluters Pay the True Cost
A Pigouvian tax is a per-unit tax on a good or activity set equal to the external cost it imposes.
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 →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.
↔ Also in Government InterventionRead more →Public Goods: What Markets Can't Provide on Their Own
A public good is non-excludable and non-rival. Free-riding prevents private markets from supplying it efficiently, making government provision or subsidy…
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