Note also that if the measurement bias has increased, this would imply that both actual and potential output growth are higher than reported, with no obvious implication for the gap between actual and potential output, and hence for inflation pressures.
Sources of higher productivity growth, all of which should show up in measured productivity, include a return on years of corporate restructuring and the increase in capital per worker associated with the current investment boom, much of which is linked to technological change, specifically the information revolution. There are a couple of reasons why this is an attractive explanation.