... important to the health of the economy. The final two parts of the book examine the role of money in the economy.In 1981–1982, total production of goods and services (called aggregate output) in the ... one country to another, they have to be convertedfrom the currency in the country of origin (say, dollars) into the currency of the coun-try they are going to (say, euros). The foreign exchange ... 1990, the eight-year expansion came to an end, with the unemployment rate rising above 7%. The economy bottomed out in 1991, and the subsequent recovery was the longest in U.S.history, with the...