In this paper, we examine the sources of the productivity growth in the U.S. computer industry from 1978 to 1999. We estimate a joint production model of output quantity and quality that distinguishes two types of technological changes: process and product innovations. Based on the estimation...

AT&T was the largest U.S. firm for most of the 20th century. Telephone operators once comprised over 50% of its workforce, but in the late 1910s it initiated a decades-long process of automating telephone operation with mechanical call switching--a technology first invented in the 1880s. We...

We examine the current state of the U.S. public corporation and how it has evolved over the last 40 years. After falling by 50 percent since its peak in 1997, the number of public corporations is now smaller than 40 years ago. These corporations are now much larger and over the last twenty years...

We evaluate the decentralized structure of the Federal Reserve System as a mechanism for generating and processing new ideas on monetary policy over the 1960 - 2000 period. We document the introduction of monetarism, rational expectations, credibility, transparency, and other monetary policy...

Early-stage firms utilize venture debt in one-third of financing rounds despite their general lack of cash flow and collateral. In our model, we show how venture debt aligns incentives within a firm. We derive a novel theoretical channel in which runway extension through debt increases firm...

We study the innovation and diffusion of technology at the industry level. We derive the full dynamic paths of an industry's evolution, from birth to its maturity, and we characterize the impact of diffusion on the incentive to innovate. The model implies that protection of innovators should be...

In Silicon Valley's computer cluster, skilled employees are reported to move rapidly between competing firms. This job-hopping facilitates the reallocation of resources towards firms with superior innovations, but it also creates human capital externalities that reduce incentives to invest in...

This paper estimates the relative price sensitivity of individuals' choice of whether to buy computers online versus in retail stores using a new data source on the computer purchase behavior of more than 20,000 people. To estimate the degree of competition between the two channels, the paper...

The impact of patent pools on the rate and direction of technological change is an open question in both theoretical and empirical studies. Economic theory makes no unequivocal prediction. By contrast, empirical studies of patent pools, to date, have largely concluded that patent pools have been...