Word
Comparative Advantage
The ability to produce something at a lower opportunity cost than another producer
Examples
The designer had a comparative advantage in layouts because coding them displaced more valuable design work.
A country can have a comparative advantage in one good even when its trading partner is more productive in both.
Origin
The phrase distinguishes relative advantage from absolute productivity. David Ricardo's 1817 discussion of foreign trade used English and Portuguese production of cloth and wine to explain how trade could benefit a country more efficient at producing both goods.
How it connects
The word shifts attention from absolute output to relative sacrifice.
This word appeared in Why the best should still trade, the Involves connection for September 20, 2026, which asked: Can someone who does everything better still benefit from a partner?
Check yourself
Who has comparative advantage in a task?
The producer who gives up less alternative output to perform it. Exactly. Comparative advantage is defined by opportunity cost, not overall size or speed.
What the sources establish
Comparative advantage is lower opportunity cost, distinct from absolute productivity; Ricardo illustrated the mechanism in 1817.
Sources
On the Principles of Political Economy and Taxation (David Ricardo; Library of Economics and Liberty), Chapter VII, On Foreign Trade: England and Portugal, cloth and wine
The Global Economy: It's a Small World After All (Federal Reserve Bank of St. Louis), Comparative advantage and opportunity cost