Slowing growth in U.S. productivity after 2004 is sometimes blamed on measurement problems, particularly in assessing the gains from innovation in IT-related goods and services. However, mismeasurement also occurred before the slowdown and, on balance, there is no evidence that it has worsened. Some innovations—such as free Internet services—have grown increasingly important, but they mainly affect leisure time. Moreover, the non-market benefits do not appear large enough to offset the effects of the business-sector slowdown.
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