There are three basic types of economic systems: traditional, command, and market. Most textbooks say the most common system throughout the world is mixed, which is a blending of two systems rather than a system itself. The type of economy a country has depends on the extent of government involvement in economic decision making. Examples are given of different countries and the percentage of public vs private sectors, with most modern economies being mixed. The three basic economic questions are what to produce, how to produce, and for whom to produce.