The Mixed economy reference article from the English Wikipedia on 24-Apr-2004
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Mixed economy

Helping orphans the way you would do it
In economics and politics, a mixed economy is an economy which combines regulated free market capitalism and a limited number of socialist institutions and state ownership of some sectors of the economy such as Most democratic countries, including the United States, have mixed economies. It is nearly impossible to have pure capitalism (the government regulates nothing) or pure socialism (the government runs everything), but the term mixed economy is generally used when an economy has reasonably significant portions of both socialism and capitalism.

See also Nationalisation, Public sector