22 lines
728 B
Markdown
22 lines
728 B
Markdown
<!-- generated: provider=openrouter model=arcee-ai/trinity-large-preview:free date=2026-02-19 source=book-1-chapter-04 -->
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# Double Coincidence of Wants
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## Definition
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The requirement in barter systems that each party to an exchange must simultaneously possess exactly what the other party desires, creating a significant barrier to trade when such matching preferences cannot be found.
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## Source Chapter
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Book I, Chapter 4
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## Context
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Smith identifies this as the primary limitation of barter systems, where a butcher with meat cannot exchange with a brewer who has beer if neither desires the other's product, demonstrating why money becomes necessary for efficient commercial exchange.
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## Economic Domain
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Exchange
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---
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