The market value of blocking patent citations
There is a growing literature that aims at assessing the private value of knowledge assets and patents. It has been shown that patents and their quality as measured by citations received by future patents contribute significantly to the market value of firms beyond their R&D stocks. This paper goes one step further and distinguishes between different types of forward citations patents can receive at the European Patent Office. While a patent can be cited as non-infringing state of the art, it can also be cited because it threatens the novelty of patent applications ('blocking citations'). Empirical results from a market value model for a sample of large, R&D-intensive U.S., European and Japanese firms show that patents frequently cited as blocking references have a higher economic value for their owners than patents cited for nonblocking reasons. This finding adds to the patent value literature by showing that different types of patent citations carry different information on the economic value of patents. The result further suggests that the total number of forward citations can be an imprecise measure of patent value.
|Date of creation:||2011|
|Date of revision:|
|Contact details of provider:|| Postal: L 7,1; D - 68161 Mannheim|
Web page: http://www.zew.de/
More information through EDIRC
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.:
- Malva, Antonio Della & Hussinger, Katrin, 2012.
"Corporate science in the patent system: An analysis of the semiconductor technology,"
Journal of Economic Behavior & Organization,
Elsevier, vol. 84(1), pages 118-135.
- Della Malva, Antonio & Hussinger, Katrin, 2010. "Corporate science in the patent system: An analysis of the semiconductor technology," ZEW Discussion Papers 10-098, ZEW - Zentrum für Europäische Wirtschaftsforschung / Center for European Economic Research.
When requesting a correction, please mention this item's handle: RePEc:zbw:zewdip:11021. 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: (ZBW - German National Library of Economics)
If references are entirely missing, you can add them using this form.