How does the government participate in a mixed economy?

A mixed economy is an economy in which can be private and/or public, in other Words the Government don't interfere with the decisions the public has to make. In a mixed economy the public decides production, distribution and other types of economic activities. A mixed economy is run controlled both by the Government as well as private owners; in a capital economy anybody can buy a share or trade, whereas at times the Government may condemn this action. One country which is considered to have a mixed economy is the United States. --Sura :D