Measured by output and income, centrally planned economies tend to be less efficient free economies where output targets, and the means to meet them are made by a private sector. However, in some sectors, Communist nations such as the former [[USSR]] have led the West in the strength and quality of some defence and space technologies at times in history. | Measured by output and income, centrally planned economies tend to be less efficient free economies where output targets, and the means to meet them are made by a private sector. However, in some sectors, Communist nations such as the former [[USSR]] have led the West in the strength and quality of some defence and space technologies at times in history. |