The role of government in the American economy extends far beyond its activities as a regulator of specific industries. The government also manages the overall pace of economic activity, seeking to maintain high levels of employment and stable prices. It has two main tools for achieving these objectives: fiscal policy, through which it determines the appropriate level of taxes and spending; and monetary policy, through which it manages the supply of money. Much of the history of economic policy in the United States since the Great Depression of the 1930s has involved a continuing effort by the government to find a mix of fiscal and monetary policies that will allow sustained growth and stable prices. That is no easy task, and there have been notable failures along the way. But the government has gotten better at promoting sustainable growth. From 1854 through 1919, the American economy spent almost as much time contracting as it did growing: the average economic expansion (defined as an increase in output of goods and services) lasted 27 months, while the average recession (a period of declining output) lasted 22 months. From 1919 to 1945, the record improved, with the average expansion lasting 35 months and the average recession lasting 18 months. And from 1945 to 1991, things got even better, with the average expansion lasting 50 months and the average recession lasting just 11 months.