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Asymmetric Information Explained: A-Level Economics Revision

Geoff Riley

21st April 2025

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In this video, we focused on a core microeconomics concept that could definitely show up in your exams: Asymmetric Information.From dodgy used cars to why financial products confuse even the experts — asymmetric info explains why some markets fail

Asymmetric Information Explained: A-Level Economics Revision

🤐 Asymmetric Information – Summary:

Asymmetric information is when one party in a deal knows more than the other — and it can seriously mess with market outcomes.

In Akerlof’s famous “Market for Lemons” model, sellers know if a used car is a dud, but buyers don’t. So buyers offer an average price, good sellers exit… and the market fills with junk. That’s market failure in action.

It explains why things like warranties, certified pre-owned labels, and trust signals exist — they help fix the imbalance and keep markets working.

When info isn’t equal, efficiency takes a hit.

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Geoff Riley

Geoff Riley FRSA has been teaching Economics for nearly forty years. He has over twenty years experience as Head of Economics at leading schools. He writes extensively and is a contributor and presenter on CPD and Revision conferences in the UK and overseas.