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Keyword: patents;

10 results found.

Economics of Industry Paper

Patents Rights and Innovation by Small and Large Firms

Mark Schankerman

This paper studies the causal impact of patents on subsequent innovation by the patent holder. The analysis is based on court invalidation of patents by the U.S. Court of Appeals for the Federal Circuit, and exploits t...Read more...

27 November 2015

Economics of Industry Paper

Spreading the Word: Geography, Policy and University Knowledge Diffusion

Sharon Belenzon and Mark Schankerman

Using new data on citations to university patents and scientific publications, and measures of distance based on Google maps, we study how geography affects university knowledge diffusion. We show that knowledge flows fr...Read more...

August 2010

Economics of Industry Paper

Patent Thickets and the Market for Innovation: Evidence from Settlement of Patent Disputes

Alberto Galasso and Mark Schankerman

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...Read more...

August 2008

Economics of Industry Paper

Strategic Patenting and Software Innovation

Michael Noel and Mark Schankerman

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...Read more...

June 2006

Economics of Industry Paper

Identifying technology spillovers and product market rivalry

Nicholas Bloom, Mark Schankerman and John Van Reenen

Support for many R&D and technology policies relies on empirical evidence that R&D “spills over” between firms. But there are two countervailing R&D spillovers: positive effects from technology spillovers and negative ef...Read more...

January 2005

Theoretical Economics Paper

Knowledge Disclosure, Patents and Optimal Organization of Research and Development

Sudipto Bhattacharya and Sergei Guriev

We develop a model of two-stage cumulative research and development (R&D), in which one Research Unit (RU) with an innovative idea bargains to license her nonverifiable interim knowledge exclusively to one of two competi...Read more...

September 2004

Economics of Industry Paper

Research Productivity and Patent Quality: Measurement with Multiple Indicators

Jean O. Lanjouw and Mark Schankerman

We analyse the determinants of the decline in measured research productivity (the patent/R&D ratio)using panel data on manufacturing firms in the U.S. for the period 1980-93. We focus on three factors: the level of deman...Read more...

December 2002

Economics of Industry Paper

Stylised Fact of Patent Litigation: Value, Scope and Ownership

Jean O. Lanjouw and Mark Schankerman

This paper investigates the characteristics of litigated patents by combining for the first time information about patent case filings from the U.S. district courts and detailed data from the U.S. Patents and Trademark O...Read more...

January 1998

Economics of Industry Paper

Optimal Patent Renewals

Francesca Cornelli and Mark Schankerman

When firms have different R&D productivities, it may be welfare increasing to differentiate patent lives across inventions. The reason is that the uniform patent life provides excessive incentives to do R&D to the low pr...Read more...

January 1996

Economics of Industry Paper

Under Threat: Potential Competition, Litigation and the Private Value of Patent Protection

Jean O. Lanjouw

This paper investigates the effect of the threat and occurrence of patent litigation on the private value of patent protection. Potential challenges are introduced into a renewal model as a factor in patentee decisions a...Read more...

July 1992