Explain comparative advantage with a simple example

The short version: comparative advantage refers to the ability to produce a good at a lower opportunity cost than another party. A quick example makes it concrete — A country can gain from trade even if it is worse at producing everything.

How to approach it step by step

Once one example makes sense, the method generalises: compute opportunity cost ratios, then let each side specialise. In a visual interactive session the example is built on screen piece by piece, so you see which quantity changes at each step instead of only reading a final answer. Ask for a harder variant and the explanation adapts on the spot.

Worked example

A country can gain from trade even if it is worse at producing everything.

The mistake most learners make

Using absolute output instead of opportunity cost to decide specialisation.

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