Measuring the Rate of Obsolescence of Patents in Japanese Manufacturing Firms

Yasuo Nakanishi and Setsuo Yamada

MPRA Paper from University Library of Munich, Germany

Abstract: This article assesses the rate of obsolescence of patents with measurements of the rate in Japan. Our study departs from Parkes and Schankerman (1989) and Schankerman (1998) because of its application of the ordered probit model. The application of this model enables us to consider the case of noncontinuous renewal fees. The estimated value of the rate of obsolescence in Chemicals is apparently large. Values of obsolescence rate in each industry except Chemicals are located above 24%. The obsolescence rate obtained by our estimates is apparently higher than in previous studies.

Keywords: Obsolescence rate; Patent; Innovation; Ordered probit model (search for similar items in EconPapers)
JEL-codes: O31 (search for similar items in EconPapers)
Date: 2008-06
New Economics Papers: this item is included in nep-ino, nep-ipr and nep-pr~
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://mpra.ub.uni-muenchen.de/10837/1/MPRA_paper_10837.pdf original version (application/pdf)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:pra:mprapa:10837

Access Statistics for this paper

More papers in MPRA Paper from University Library of Munich, Germany Ludwigstraße 33, D-80539 Munich, Germany. Contact information at EDIRC.
Bibliographic data for series maintained by Joachim Winter ().