Voluntary Trade

trade is only useful when it is

A tariff is a _ placed on goods coming into a country

In order for countries to trade a system of

_ is a limit on the amount of foreign good that can be imported.

A _ Goal is not to protect but to punish another nation by suspending trade

Nations instead choose to focus on only those products/services which they are capable of providing fastest, cheapest, and in great abundance. This phenomenon is known as _