Final answer:
Mixed economies combine market and command elements, leading to faster growth than command economies and the creation of safety net programs like Social Security.
Step-by-step explanation:
One of the advantages of a mixed economy is that it can grow faster than command economies. In mixed economies, the government has the ability to create safety net programs such as Social Security, which can provide additional security and welfare to its citizens.
These economies have the flexibility to combine elements of both market and command systems, allowing for a balance between economic freedom and governmental intervention. Moreover, the private property rights inherent in market systems of a mixed economy create incentives for efficiency and productivity that can spur growth.