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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 ...
Working Paper
How Fast are Semiconductor Prices Falling?
The Producer Price Index (PPI) for the United States suggests that semiconductor prices have barely been falling in recent years, a dramatic contrast to the rapid declines reported from the mid-1980s to the early 2000s. This slowdown in the rate of decline is puzzling in light of evidence that the performance of microprocessor units (MPUs) has continued to improve at a rapid pace. Over the course of the 2000s, the MPU prices posted by Intel, the dominant producer of MPUs, became much stickier over the chips' life cycle. As a result of this change, we argue that the matched-model methodology ...
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
Is there a broad credit channel for monetary policy?
Journal Article
Information technology and productivity: where are we now and where are we going?
Productivity growth in the U.S. economy jumped during the second half of the 1990s, a resurgence that many analysts linked to developments in information technology (IT). However, shortly after this consensus emerged, demand for IT products fell sharply, leading to a debate about the connection between IT and productivity and about the sustainability of the faster growth. ; This article contributes to this debate in two ways. First, the authors provide updated estimates of the proximate sources of growth using a growth accounting framework that focuses on information technology. Their results ...
Working Paper
Reassessing the social returns to equipment investment
Working Paper
The term structure of commercial paper rates
This paper tests the expectations hypothesis in the market for commercial paper. Our main dataset, which is new to the literature, consists of daily indexes constructed from the actual market yields for nearly all commercial paper issued by U.S. corporations between January 1998 and August 2003. We show that the term premia built into commercial paper yields rise dramatically at year-end, causing the expectations hypothesis to be rejected. However, once we control for these predictable year-end effects, we find the reverse--that commercial paper yields largely conform with the expectations ...