Before revision: An alternative analysis of economies, the three-sector theory, subdivides them into: the primary sector (producing raw materials) the secondary sector (carrying out manufacturing) the tertiary sector (providing sales and services) In the United States the business sector accounted for about 78 percent of the value of gross domestic product (GDP) .
After revision: In the United States the business sector accounted for about 78 percent of the value of gross domestic product (GDP) .