The informal sector or informal economy is that part of an economy that is not taxed, monitored by any form of government, or included in any gross national product (GNP), unlike the formal economy.
Other terms used to refer to the informal sector can include the black market, the shadow economy, the underground economy and System D. Associated idioms include under the table and "off the books".
Famous quotes containing the words economy and/or informal:
“I favor the policy of economy, not because I wish to save money, but because I wish to save people. The men and women of this country who toil are the ones who bear the cost of the Government. Every dollar that we carelessly waste means that their life will be so much the more meager. Every dollar that we prudently save means that their life will be so much the more abundant. Economy is idealism in its most practical terms.”
—Calvin Coolidge (18721933)
“We are now a nation of people in daily contact with strangers. Thanks to mass transportation, school administrators and teachers often live many miles from the neighborhood schoolhouse. They are no longer in daily informal contact with parents, ministers, and other institution leaders . . . [and are] no longer a natural extension of parental authority.”
—James P. Comer (20th century)