The introduction of a new product generation forces incumbents in network industries to rebuild their installed base to maintain an advantage over potential entrants. We study if backward compatibility moderates this process of rebuilding an installed base. Using a structural model of the U.S....

We estimate the effect of consumer search on the price of the purchased product in a physical store environment. We implement the analysis using a unique data set obtained from radio frequency identification tags, which are attached to supermarket shopping carts. This technology allows us to...

Using US firm level panel data we simultaneously assess the contributions to productivity of three potential sources of research and development spillovers: geographic, technological, and product market ("horizontal"). To do so, we construct new measures of geographic proximity based on the...

How does a major financial network innovation influence firm performance? Despite much speculation we have little hard quantitative evidence about the impact of technology diffusion in financial services. In this paper we use the entire adoption history for SWIFT (the Society for Worldwide...

Cumulative innovation is central to economic growth. Do patent rights facilitate or impede follow-on innovation? We study the causal effect of removing patent rights by court invalidation on subsequent research related to the focal patent, as measured by later citations. We exploit random...

We build a model of firm-level innovation, productivity growth and reallocation featuring endogenous entry and exit. A key feature is the selection between high- and low-type firms, which differ in terms of their innovative capacity. We estimate the parameters of the model using detailed US...

We introduce a novel empirical strategy to measure credit shocks. Theoretically, we show that credit shocks reduce the value of long term investments relative to short term ones. Under the (conservative) assumption that demand shocks affect short and long run investments similarly, credit shocks...

How do firms respond to technological advances that facilitate the automation of tasks? Which tasks will they automate, and what types of worker will be replaced as a result? We present a model that distinguishes between a task's engineering complexity and its training requirements. When two...

A classic question in industrial organization is whether competition raises productivity and if so, through what mechanism? I discuss recent empirical evidence from both large-scale databases and specific industries which suggests that tougher competition does indeed raise productivity and one...

Chinese economic growth has been spectacular in the last 30 years. We investigate the role of International Joint Ventures with Technology Transfer agreements, an understudied area. Technology transfer is the traditional mechanism for developing countries to "catch up" and has been a key...