IDEAS home Printed from
MyIDEAS: Login to save this paper or follow this series

Variety of technological trajectories in low emission vehicles (LEVs): a patent data analysis

  • Vanessa OLTRA (E3i-IFReDE-GRES)

This paper focuses on the diversity of engine technologies for Low Emission Vehicles (LEVs) that are developed by car manufacturers in order to substitute for the conventional internal combustion engine vehicle. Our purpose is to analyse the competition between the various technologies for LEVs as well as the innovative strategy of car manufacturers. We first propose to define and to represent these technological trajectories in order to compare their performances and to identify their strength and weaknesses. The technological bottlenecks, the barriers to the adoption of these alternative engine technologies as well as the features of this technological competition are underlined. We then use a patent data analysis to study the patent portfolios of the main car manufacturers in these technologies on the period from 1990 to 2005. The dynamics of patents applied by car manufacturers gives insight on the competition among technologies and on the strategy of firms. This analysis emphasises the progressive diversification of firms patent portfolios over the whole set of engine technologies and the differentiated strategic positioning of car manufacturers according to countries.

If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.

File URL:
Download Restriction: no

Paper provided by Groupement de Recherches Economiques et Sociales in its series Cahiers du GRES (2002-2009) with number 2006-20.

in new window

Date of creation: 2006
Date of revision:
Handle: RePEc:grs:wpegrs:2006-20
Contact details of provider: Web page:

More information through EDIRC

References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:

as in new window
  1. Vanessa OLTRA (GRES-IFReDE-E3i) & Maïder SAINT-JEAN (GRES-IFReDE-E3i), 2003. "The dynamics of environmental innovations : three stylised trajectories of clean technology," Cahiers du GRES (2002-2009) 2003-03, Groupement de Recherches Economiques et Sociales.
  2. Zvi Griliches, 1998. "Patent Statistics as Economic Indicators: A Survey," NBER Chapters, in: R&D and Productivity: The Econometric Evidence, pages 287-343 National Bureau of Economic Research, Inc.
  3. Lanjouw, Jean Olson & Mody, Ashoka, 1996. "Innovation and the international diffusion of environmentally responsive technology," Research Policy, Elsevier, vol. 25(4), pages 549-571, June.
  4. repec:fth:harver:1473 is not listed on IDEAS
  5. Brunnermeier, Smita B. & Cohen, Mark A., 2003. "Determinants of environmental innovation in US manufacturing industries," Journal of Environmental Economics and Management, Elsevier, vol. 45(2), pages 278-293, March.
Full references (including those not matched with items on IDEAS)

This item is featured on the following reading lists or Wikipedia pages:

  1. Studies on the automobile industry

When requesting a correction, please mention this item's handle: RePEc:grs:wpegrs:2006-20. See general information about how to correct material in RePEc.

For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Vincent Frigant)

If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

If references are entirely missing, you can add them using this form.

If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

Please note that corrections may take a couple of weeks to filter through the various RePEc services.

This information is provided to you by IDEAS at the Research Division of the Federal Reserve Bank of St. Louis using RePEc data.