This paper studies product obsolescence, the entry and exit of firms, and the evolution of firm size as foundation of endogenous economic growth. I develop a dynamic general equilibrium model with heterogenous firms to analyze firm behavior in an economic environment that is characterized by a...

This paper examines the role played by uncertainty and sunk costs on the timeseries fluctuations in industry structure as captured by the number of firms and establishments, and concentration. Using an extensive dataset covering 267 U.S. manufacturing industries over a 30-year period, our...

In contrast to the very large literature on skill-biased technical change among workers, thereis hardly any work on the importance of skills for the entrepreneurs who employ thoseworkers, and in particular on their evolution over time. This paper proposes a simple theory ofskill-biased change in...

Using the framework provided by the asymmetric-information and real-options theories, we examine the impact of uncertainty on firms' decisions and market outcomes. We construct alternative measures of uncertainty based on survey of professional forecasters and our estimation of regression-based...

This paper shows that the R&D intensity of an industry plays an important role in determining international trade patterns via its effect on scale economies. I first develop a model of trade with heterogeneous firms where firms compete with each other by spending on fixed product development...

Liberalization is widely recognized to drive productivity growth. Retail trade is often thought to substantially contribute to the frequently debated productivity gap between Europe and the U.S. In Europe, entry regulations empower local authorities to decide on the entry of new stores. We use a...

Entry of large ("big-box") stores along with a drastic fall in the total number of stores is a striking trend in retail markets. We use a dynamic structural model to estimate retail productivity in a local market setting. In particular, we provide a general strategy of how to measure the causal...

The average firm size of the top R&D investors among US-based companies is smaller than that of the EU-based firms. Does this help to explain why the US has a greater R&D intensity, or is the higher firm size in the EU, just as its lower R&D intensity, determined by the sectors in which the top...

We investigate structural change in the PR China during a period of particularly rapid growth 1998-2014. For this, we utilize sectoral data from the World Input-Output Database and firm-level data from the Chinese Industrial Enterprise Database. Starting with correlation laws known from the...

This paper analyzes a model of oligopolistic competition with ongoing investment. It incorporates the following models as special cases: incremental investment, patent races, learning-by-doing, and network externalities. We investigate circumstances under which a firm with low costs or high...