Trade in a Village Economy

Comparing Barter and Commodity Money Systems

A farmer has a surplus of wheat and wants to acquire a new plow. The blacksmith who makes plows, however, does not need wheat but instead wants a new pair of shoes from the shoemaker. In this scenario, how does the introduction of a widely accepted commodity, such as silver coins, most significantly improve the efficiency of trade?

The Core Inefficiency of Direct Trade

The adoption of a commodity, such as salt or grain, as a medium of exchange completely eliminates all the inefficiencies found in a direct trade system (barter) without introducing any new challenges of its own.

A barter system, where goods are traded directly for other goods, has several inherent inefficiencies. The introduction of a widely accepted commodity (like gold, salt, or grain) as money helps to resolve these issues. Match each inefficiency of a barter system with the specific function of commodity money that addresses it.

Justifying the Historical Shift from Barter

Island Economies

The Trader's Dilemma

Consider four different early societies. In which of the following scenarios would the introduction of a single, commonly accepted good for exchange (like salt, shells, or metal rings) provide the greatest improvement in economic efficiency?