- coins
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Government-issued pieces of metal that have value and are used as money.
- Economics
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The study of how people, firms and societies choose to allocate scarce resources with alternative uses.
- exchange
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Trading a good or service for another good or service, or for money.
- services
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Activities performed by people, firms or government agencies to satisfy economic wants.
- specialization
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A situation in which people produce a narrower range of goods and services than they consume.
- trade
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The exchange of goods and services for money or other goods and services.