Mapping Technological Trajectories as Patent Citation Networks. An application to Data Communication Standards
AbstractWe use patent citation networks to study the dynamics of technical change in Ethernet, a standard for data communication. We first consider the evolution of the broad technological system of local area networks (LANs) and we identify the most significant inventions within the specific subfield of Ethernet. Then we analyse the structure of connectivity of patent citation networks to reconstruct the main technological trajectories in this subfield. Our results suggest that these technological trajectories are characterized by the presence of a number of interconnected technological environments which cluster following an engineering logic. These clusters include the most significant patents related to 'milestones inventions' in the evolution of the LAN technology. Thus, our analysis of the structure of connectivity in patent citation networks seems appropriate to capture both the cumulativeness associated to the development of a specific technology and the significant discontinuities that punctuate the trajectory, as well as the technological interrelatedness characterising large technical systems.
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Bibliographic InfoPaper provided by SPRU - Science and Technology Policy Research, University of Sussex in its series SPRU Working Paper Series with number 166.
Length: 58 pages
Date of creation: 02 2008
Date of revision:
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Technical systems; Technological trajectories; Patents; Network analysis; Data communications;
Other versions of this item:
- Roberto Fontana & Alessandro Nuvolari & Bart Verspagen, 2009. "Mapping technological trajectories as patent citation networks. An application to data communication standards," Economics of Innovation and New Technology, Taylor and Francis Journals, vol. 18(4), pages 311-336.
- O30 - Economic Development, Technological Change, and Growth - - Technological Change; Research and Development; Intellectual Property Rights - - - General
- O33 - Economic Development, Technological Change, and Growth - - Technological Change; Research and Development; Intellectual Property Rights - - - Technological Change: Choices and Consequences; Diffusion Processes
- L96 - Industrial Organization - - Industry Studies: Transportation and Utilities - - - Telecommunications
This paper has been announced in the following NEP Reports:
- NEP-ALL-2008-03-01 (All new papers)
- NEP-IPR-2008-03-01 (Intellectual Property Rights)
- NEP-NET-2008-03-01 (Network Economics)
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