Compare and contrast the goals of command and mixed market economies. why are there many more mixed market economies than command economies in the world today?

Mixed market economies focus on preserving as much freedom to make economic choices as possible. Governments in these economies have limited involvement in managing and regulating the economy. In contrast, command economies are focused most on preserving and requiring equal opportunities, which means governments that greatly regulate the economy. More economic systems are geared toward offering producers and consumers the freedom to make economic choices, so mixed market economies are more common in the world today.

There are quite a few applicable words here. modeling, programming, etc. let me know the options.