Mapping Technological Trajectories as Patent Citation Networks. A Study on the History of Fuel Cell Research

Bart Verspagen

No 19, Research Memorandum from Maastricht University, Maastricht Economic Research Institute on Innovation and Technology (MERIT)

Abstract: Technological change is argued to be taking place along ordered and selective pat-terns, shaped jointly by technological and scientific principles, and economic and other societal factors. Historical, descriptive analysis is often used to analyze these ''trajectories''. Recently, quantitative methods have been proposed to map these tra-jectories. It is argued that such methods have, so far, not been able to illuminate the engineering side of technological trajectories. In order to fill this gap, a methodology proposed by Hummon and Doreian (1989) is used and extended to undertake a cita-tion analysis of patents in the field of fuel cells.

Keywords: research and development (search for similar items in EconPapers)
Date: 2005
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Citations: View citations in EconPapers (11)

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Working Paper: Mapping Technological Trajectories as Patent Citation Networks. A Study on the History of Fuel Cell Research (2005)
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