Final answer:
The economic systems existing today are primarily mixed economies, blending command and market system characteristics to different extents.
Explanation:
Economic systems in the world today primarily fall under the category of mixed economies, combining aspects of command and market systems. Examples include the U.S. with a market-oriented approach and countries like China and Russia with varying degrees of government involvement.
Mixed economies are systems that blend features of centrally planned and free market systems, aiming to strike a balance between government control and private enterprise.
A market capitalist economy emphasizes private ownership, while a command socialist system prioritizes government ownership and control over resources and production decisions.
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