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Conference Paper
The resurgence of growth in the late 1990s: is information technology the story?
The performance of the U.S. economy over the past several years has been remarkable, including a rebound in labor productivity growth after nearly a quarter century of sluggish gains. To assess the role of information technology in the recent rebound, this paper re-examines the growth contribution of computers and related inputs with the same neoclassical framework that we have used in earlier work. ; Our results indicate that the contribution to productivity growth from the use of information technology - including computer hardware, software, and communication equipment - surged in the ...
Working Paper
Explaining a productive decade
This paper analyzes the sources of U.S. productivity growth in recent years using both aggregate and industry-level data. We confirm the central role for information technology (IT) in the productivity revival during 1995-2000 and show that IT played a significant, though smaller, role after 2000. Productivity growth after 2000 appears to have been boosted by industry restructuring and cost cutting in response to profit pressures, an unlikely source of future strength. In addition, the incorporation of intangible capital into the growth accounting framework takes some of the luster off the ...
Journal Article
Is there a bank lending channel for monetary policy?
Using data for the U.S. manufacturing sector, we investigate the existence of a credit channel for monetary policy that operates through bank lending. Our test is based on the behavior of the mix of bank and nonbank debt after a shift in monetary policy. We allow for a differential response to monetary policy of the debt mix for small firms and large firms, and we account for movements in all major types of nonbank debt (including trade credit and long-term debt). In contrast to earlier work, we find no support for a bank lending channel.
Working Paper
Investment behavior, observable expectations, and internal funds
We use earnings forecasts from securities analysts to construct more accurate measures of the fundamentals that affect the expected returns to investment. We find that investment responds significantly -- in both economic and statistical terms -- to our new measures of fundamentals. Our estimates imply that the elasticity of the investment-capital ratio with respect to a change in fundamentals is generally greater than unity. In addition, we find that internal funds are uncorrelated with investment spending, even for selected subsamples of firms -- those paying no dividends and those without ...
Working Paper
How fast do personal computers depreciate? concepts and new estimates
This paper examines the prices for communications equipment, an important component of information technology. Unlike prices for computers which officially fall sharply every year, the official prices for communications equipment have barely budged over the past decade. This paper combines earlier work on prices for several segments of communications equipment with new results for public exchanges, fiber optic equipment, and modems. The results suggest that prices for communications equipment fall much faster than official statistics would indicate, but not as fast as computers. The results ...
Working Paper
Is the information technology revolution over?
Given the slowdown in labor productivity growth in the mid-2000s, some have argued that the boost to labor productivity from IT may have run its course. This paper contributes three types of evidence to this debate. First, we show that since 2004, IT has continued to make a significant contribution to labor productivity growth in the United States, though it is no longer providing the boost it did during the productivity resurgence from 1995 to 2004. Second, we present evidence that semiconductor technology, a key ingredient of the IT revolution, has continued to advance at a rapid pace and ...
Working Paper
How fast do personal computers depreciate? concepts and new estimates
This paper provides new estimates of depreciation rates for personal computers using an extensive database of prices of used PCs. Our results show that PCs lose roughly half their remaining value, on average, with each additional year of use. We decompose that decline into age-related depreciation and a revaluation effect, where the latter effect is driven by the steep ongoing drop in the constant-quality prices of newly-introduced PCs. Our results are directly applicable for measuring the depreciation of PCs in the National Income and Product Accounts (NIPAs) and were incorporated into the ...
Working Paper
The resurgence of growth in the late 1990s: is information technology the story?
The performance of the U.S. economy over the past several years has been remarkable, including a rebound in labor productivity growth after nearly a quarter century of sluggish gains. To assess the role of information technology in the recent rebound, this paper re-examines the growth contribution of computers and related inputs with the same neoclassical framework that we have used in earlier work. Our results indicate that the contribution to productivity growth from the use of information technology -- including computer hardware, software, and communication equipment -- surged in the ...