In the market economy, wealth generators do not produce everything for their own consumption. Part of their production is used in exchange for the produce of other producers. Hence, in the market economy, production precedes consumption.
This means that something is exchanged for something else. This also means that an increase in the production of goods and services sets in motion an increase in the demand for goods and services.
According to David Ricardo,
No man produces, but with a view to consume or sell, and he never sells, but with an intention to purchase some other commodity, which may be immediately useful to him, or which may contribute to future production. By producing, then, he necessarily becomes either the consumer of his own goods, or the
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