Munich Personal RePEc Archive

Measuring the Rate of Obsolescence of Patents in Japanese Manufacturing Firms

Nakanishi, Yasuo and Yamada, Setsuo (2008): Measuring the Rate of Obsolescence of Patents in Japanese Manufacturing Firms.

[img]
Preview
PDF
MPRA_paper_10837.pdf

Download (55kB) | Preview

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.

UB_LMU-Logo
MPRA is a RePEc service hosted by
the Munich University Library in Germany.