Complete text of Greenspan testimony

But while household spending may well play a smaller role in the expansion going forward, business executives apparently have become somewhat more optimistic in recent months. Capital spending and corporate borrowing have firmed noticeably, but some of the latter may have been directed to finance the recent backup in inventories. Mergers and acquisitions, though, have clearly perked up.

Even in the current much-improved environment, however, some caution among business executives remains. Although capital investment has been advancing at a reasonably good pace, it has nonetheless lagged the exceptional rise in profits and internal cash flow. This is most unusual; it took a deep recession to produce the last such configuration in 1975. The lingering caution evident in capital spending decisions has also been manifest in less-aggressive hiring by businesses. In contrast to the typical pattern early in previous business-cycle recoveries, firms have appeared reluctant to take on new workers and have remained focused on cost containment.

As opposed to the lingering hesitancy among business executives, participants in financial markets seem very confident about the future and, judging by the exceptionally low level of risk spreads in credit markets, quite willing to bear risk. This apparent disparity in sentiment between business people and market participants could reflect the heightened additional concerns of business executives about potential legal liabilities rather than a fundamentally different assessment of macroeconomic risks.

Turning to the outlook for costs and prices, productivity developments will likely play a key role. The growth of output per hour slowed over the past half year, giving a boost to unit labor costs after two years of declines. Going forward, the implications for inflation will be influenced by the extent and persistence of any slowdown in productivity. A lower rate of productivity growth in the context of relatively stable increases in average hourly compensation has led to slightly more rapid growth in unit labor costs. Whether inflation actually rises in the wake of slowing productivity growth, however, will depend on the rate of growth of labor compensation and the ability and willingness of firms to pass on higher costs to their customers. That, in turn, will depend on the degree of utilization of resources and how monetary policymakers respond. To date, with profit margins already high, competitive pressures have tended to limit the extent to which cost pressures have been reflected in higher prices.

Productivity is notoriously difficult to predict. Neither the large surge in output per hour from the first quarter of 2003 to the second quarter of 2004, nor the more recent moderation was easy to anticipate. It seems likely that these swings reflected delayed efficiency gains from the capital goods boom of the 1990s. Throughout the first half of last year, businesses were able to meet increasing orders with management efficiencies rather than new hires. But conceivably the backlog of untapped total efficiencies has run low, requiring new hires. Indeed, new hires as a percent of employment rose in the fourth quarter of last year to the highest level since the second quarter of 2001.

There is little question that the potential remains for large advances in productivity from further applications of existing knowledge, and insights into applications not even now contemplated doubtless will emerge in the years ahead. However, we have scant ability to infer the pace at which such gains will play out and, therefore, their implications for the growth of productivity over the longer run. It is, of course, the rate of change of productivity over time, and not its level, that influences the persistent changes in unit labor costs and hence the rate of inflation.

The inflation outlook will also be shaped by developments affecting the exchange value of the dollar and oil prices. Although the dollar has been declining since early 2002, exporters to the United States apparently have held dollar prices relatively steady to preserve their market share, effectively choosing to absorb the decline in the dollar by accepting a reduction in their profit margins. However, the recent somewhat quickened pace of increases in U.S. import prices suggests that profit margins of exporters to the United States have contracted to the point where the foreign shippers may exhibit only limited tolerance for additional reductions in margins should the dollar decline further.

The sharp rise in oil prices over the past year has no doubt boosted firms' costs and may have weighed on production, particularly given the sizable permanent component of oil price increases suggested by distant-horizon oil futures contracts. However, the share of total business expenses attributable to energy costs has declined appreciably over the past thirty years, which has helped to buffer profits and the economy more generally from the adverse effect of high oil and natural gas prices. Still, although the aggregate effect may be modest, we must recognize that some sectors of the economy and regions of the country have been hit hard by the increase in energy costs, especially over the past year.

Despite the combination of somewhat slower growth of productivity in recent quarters, higher energy prices, and a decline in the exchange rate for the dollar, core measures of consumer prices have registered only modest increases. The core PCE and CPI measures, for example, climbed about 1-1/4 and 2 percent, respectively, at an annual rate over the second half of last year.

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