"The Soviet Union and its satellite Socialist countries in Eastern Europe have typically avoided unemployment and business cycles, except as they are induced through their trade with the Western World. But on the other hand they are clearly inefficient and wasteful, at least relative to the West. As repeated statements by the socialist economists themselves make clear, the excessive concentration of economic decision-making is a prime cause of the inefficiency. There are recurring demands for "liberalization," even by the highest authorities (Yuri Andropov, the effective head of the Soviet Union, being the latest example), but they are responded to only mildly or not at all. Clearly, a really major step toward decentralization of economic power, to the plant managers or the workers themselves, is perceived as a threat to the system."
January 1, 1970
https://en.wikiquote.org/wiki/Kenneth_Arrow