coins

Government-issued pieces of metal that have value and are used as money.


Economics

The study of how people, firms and societies choose to allocate scarce resources with alternative uses.


exchange

Trading a good or service for another good or service, or for money.


services

Activities performed by people, firms or government agencies to satisfy economic wants.


specialization

A situation in which people produce a narrower range of goods and services than they consume.


trade

The exchange of goods and services for money or other goods and services.