No. 362 · Fixing problems · Economics
Market Failure
Free markets go wrong when prices leave out costs that fall on someone else.
In the Almanac
“The Great Smog”, 1952 · “Volkswagen”, 2015
Both stories in full, three ways to use it and where it misleads.
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Questions
What is Market Failure?
Market Failure happens when a free market, on its own, fails to allocate resources efficiently. Pollution, hidden information and shared goods nobody pays for can all make prices tell a misleading story.
How do you use Market Failure?
Use it to ask who really pays for a deal or a shortcut. When costs land on people outside the transaction, rules or collective action may be needed. Just remember that fixes can fail too, so look for careful, targeted solutions.
When does Market Failure matter?
Market Failure is one of the 40 mental models for fixing problems, the situations where you ask: Why does this keep going wrong, and how do I fix it for good? Within that, it belongs to “Rewards and rules”, alongside Cap and Trade, Coase Theorem and Goodhart’s Law.
What is an example of Market Failure?
Two stories show it at work: The Great Smog (1952) and Volkswagen (2015). Both are told in full in The Mental Models Daily Almanac, which has two stories for each of its 365 models.
Which mental models are related to Market Failure?
Tragedy of the Commons, Free Rider Problem and Adverse Selection. Market Failure itself comes from economics.