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Author: Jean O. Lanjouw

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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

Enforcing Intellectual Property Rights

Jean O. Lanjouw and Mark Schankerman

We study the determinants of patent suits and their outcomes over the period 1978-1999 by linking detailed information from the U.S. patent office, the federal court system, and industry sources. The probability of being...Read more...

December 2001

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

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