Economics · Research Worlds
Hidden quality can wreck a market
If buyers cannot tell a good car from a lemon, they will not pay a good-car price — and the good cars leave.
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Watch the 90-second visual story ↗What will you explore?
Akerlof, 1970
Markets depend on information, not merely supply and demand.
How does it work?
Watch a 90-second cinematic explanation, or explore a story that pauses so you can change its central mechanism. Inspect the source evidence, compare outcomes and resume the narration. This free Lesson Worlds adaptation needs no account or download; younger learners may want help from a parent or teacher.
Inside the cinematic story
Why do the good cars leave?
The same appearance. Different hidden quality.
A price for an uncertain mix.
Buyer uncertainty meets seller knowledge.
The offer changes the lot.
Withdrawal changes the quality available.
Take control: Which owners stay? Offer 4 · Offer 6 · Offer 9
The feedback turns.
Less trust → lower offers → fewer good cars
Let quality become visible.
Compare hidden and visible quality.
Take control: What can the buyer see? Hidden quality · Quality visible
Information keeps trade possible.
A market is also an information system.
Discuss the evidence
Before starting, explain what you think this claim means: Markets depend on information, not merely supply and demand. After exploring, choose one stage above and describe what its model helps you see. Separate what you observed in the adaptation from what the original researchers measured.
Read the original publication for its methods, evidence and limitations. Ask which part of the explanation the interactive model leaves out, and what additional evidence you would need to test the claim yourself.
An original teaching model of adverse selection, not observed car-market data or a reproduction of Akerlof's equations. Car qualities, reservation prices and offers are invented. Perfect disclosure is a comparison, not a guarantee that real warranties eliminate uncertainty.
Original research
The Market for “Lemons”: Quality Uncertainty and the Market Mechanism
George A. Akerlof · The Quarterly Journal of Economics 84, 488–500 (August 1970) · 1970
Educational adaptation by Lesson Worlds. Not affiliated with the author or Oxford University Press. The original publication may have its own access terms.