It’s one of the most powerful and counterintuitive ideas in economics. Proposed by David Ricardo in the early 19th century, it explains why trade is mutually beneficial even if one country is better at producing everything than its trading partner.
The key insight is this: don't focus on what you're absolutely best at; focus on what you're least bad at.
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It is the exchange of coi and the person becomes rich or poor. The really interesting part is that comparative advantage isn't static countries can develop new advantages over time through investment in education, infrastructure, and technology