When Soviet central planners began to mechanize the cotton harvest in earnest in 1958, they expected more rapid diffusion than the market-driven process that had begun in the United States a decade earlier. But despite high output of cotton-picking machines, the share of the crop harvested mechanically grew more slowly than in the United States. The factor proportions in Central Asia did not justify mechanization: although planners could enforce introduction of the new technology, investment in cotton-harvesting machines was largely a waste of resources. The costs of premature introduction are estimated at over $1 billion in 1960s prices.