Why are most modern economies referred to as mixed economies?

The notion of a mixed economy is not inclusive to capitalist economies - that is, economies structured upon capital accumulation and private, profit-seeking enterprises. Many different proposals for socialist economic systems call for a type of mixed economy, where multiple forms of ownership of the means of production co-exist with each other. For example, Alec Nove's conception of feasible socialism envisioned an economic system based on a combination of state-enterprises for large industries, worker and consumer cooperatives, private enterprises for small-scale operations, and individual enterprise.[20]

Many proposals for market socialism involve a role for both economic planning and market forces in coordinating economic decisions.