We propose a framework for understanding recurrent historical episodes of vigorous economic expansion accompanied by extreme asset valuations, as exhibited by the U.S. in the 1990s. We interpret this phenomenon as a high-valuation equilibrium with a low effective cost of capital based on...

We examine the effect of patenting on the survival prospects of 356 internet-related firms that IPO'd at the height of the stock market bubble of the late 1990s. By March 2005, nearly 2/3 of these firms had delisted from the NASDAQ exchange. Although changes in the legal environment in the US in...

Not necessarily. The fundamental value of a firm increases with uncertainty about average future profitability, and this uncertainty was unusually high in the late 1990s. We calibrate a stock valuation model that includes this uncertainty, and show that the uncertainty needed to match the...

A surprisingly large amount of commentary today marks the beginning of the dot-com bubble of the late 1990s from either the Netscape Communications initial public offering of 1995 or Alan Greenspan's quot;irrational exuberancequot; speech of 1996. We believe that this is wrong: we see little...

We review the evidence that artificial intelligence (AI) is having a large effect on the economy. Across a variety of statistics—including robotics shipments, AI startups, and patent counts—there is evidence of a large increase in AI-related activity. We also review recent research in this...

Using a unique nationally representative sample of U.S. establishments surveyed in 1993 and 1996, we examine the relationship between workplace innovations and establishment productivity and wages. We match plant level practices with plant level productivity and wage outcomes and estimate...

The accelerated introduction of information and communications technology into the economy has created numerous challenges for policymakers. This paper describes this New Economy and then proceeds to examine difficulties created for policymakers. The increased flexibility of the new economy...

During the four years 1995-99 U. S. productivity growth experienced a strong revival and achieved growth rates exceeding that of the golden age' of 1913-72. Accordingly many observers have declared the New Economy' (the Internet and the accompanying acceleration of technical change in computers...

It is often argued that 'new economy' jobs are less likely to use traditional employment relationships, and more likely to rely on 'alternative' or 'contingent' work. When we look at new economy jobs classified on the basis of employment in high-tech industries, we do not find greater use of...

The extension of information and communication technologies to economic activity is changing the labour market in important ways. This article shows that computerization and use of the Internet are associated with greater hours worked as well as higher wages; that IT occupations are rapidly...