Gross domestic product - GDP

'''Gross domestic product - GDP '''

definition          The value of all final goods and services produced in a country in one year (see also gross national product). GDP can be measured by adding up all of an economy's incomes- wages, interest, profits, and rents- or expenditures- consumption, investment, government purchases, and net exports (exports minus imports). Both results should be the same because one person's expenditure is always another person's income, so the sum of all incomes must equal the sum of all expenditures.

                             http://www.worldbank.org/depweb/beyond/global/glossary.html