I consider the implications of recent research for R&D policy in developing countries. Typical new growth models, which assume free entry and no strategic behaviour by R&D producers, are less appropriate for policy guidance than strategic oligopoly models. But the latter have ambiguous...

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...

Strategic patenting is widely believed to raise the costs of innovating, especially in industries characterised by cumulative innovation. This paper studies the effects of strategic patenting on R&D, patenting and market value in the computer software industry. We focus on two key aspects:...

Giuseppe Berlingieri looks at the structural transformation of the US economy over the past 60 years.

Giuseppe Berlingieri looks at the structural transformation of the US economy over the past 60 years.

This paper investigates the impact of outsourcing on sectoral reallocation in the U.S. over the period 1948-2002. Roughly 40% of the growth of the service sector comes from professional and business services. This is an unusual industry as more than 90% of its output is an intermediate input to...

We study how fragmentation of patent rights ('patent thickets') and the formation of the Court of Appeal for the Federal Circuit (CAFC) affected the duration of patent disputes, and thus the speed of technology diffusion through licensing. We develop a model of patent litigation which predicts...

Using new data on citations to university patents and scientific publications, we study how geography affects university knowledge spillovers. Citations to patents decline sharply with distance up to about 150 miles and are strongly constrained by state borders. Distance also constrains...

In this paper we investigate the evolution of quality adjusted prices for servers motivated by two facts. First, the productivity acceleration in the US economy since the mid 1990s is closely linked to spread of information technology of which networked computing is a large component. Second,...

Can directed technical change be used to combat climate change? We construct new firm-level panel data on auto industry innovation distinguishing between "dirty" (internal combustion engine) and "clean" (e.g. electric and hybrid) patents across 80 countries over several decades. We show that...