2.4. Further Reflection on the Rapidity or Slowness of the Circulation of Money in Exchange
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Large transactions can be accomplished with the use of bills of exchange or barter, which reduces the demand for money. Ordinary transactions by people require actual coin money in circulation. A variety of factors, therefore, affect the flow of money in circulation and this in turn affects the amount of money in circulation.
From Part 2: Money and Interest. Narrated by Millian Quinteros.