Question

which group creates regulations in mixed market economies

Answer 1

In mixed-market economies, the government creates regulations. That's why it is mixed and not a fully free market economy.

Answer 2

Answer: The government

A mixed market economy is one that combines the characteristics of command economies with those of free market economies. One of the elements of command economies that are usually implemented in mixed market economies is the creation of certain regulations that moderate the actions that are possible in the economy. These regulations are created by the government.