The decision on what to produce is a problem in all economic systems. It is one of the fundamental questions of economics and refers to the allocation of scarce resources to the production of different goods and services. In a market economy, this decision is made by the interaction of supply and demand, while in a planned economy, it is made by central planning authorities. In a mixed economy, the decision is a combination of market forces and government intervention. Therefore, the problem of what to produce exists in all economic systems.