The resource advantages of centralization in an underdeveloped economy played a part in initial successes, as did the enthusiasm of workers to rebuild and see their factories and countries succeed. But there were also inefficiencies built into the planned economy, which became more glaring as economies matured. There was a lack of efficient allocation, innovation, and product differentiation. There was also a lack of incentives for workers, and a lack of economizing or preservation of resources, natural or industrial.
