Nakanishi, Yasuo and Yamada, Setsuo (2008): Measuring the Rate of Obsolescence of Patents in Japanese Manufacturing Firms.
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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.
|Item Type:||MPRA Paper|
|Original Title:||Measuring the Rate of Obsolescence of Patents in Japanese Manufacturing Firms|
|Keywords:||Obsolescence rate, Patent, Innovation, Ordered probit model|
|Subjects:||O - Economic Development, Technological Change, and Growth > O3 - Technological Change; Research and Development; Intellectual Property Rights > O31 - Innovation and Invention: Processes and Incentives|
|Depositing User:||Yasuo Nakanishi|
|Date Deposited:||30. Sep 2008 04:57|
|Last Modified:||13. Feb 2013 14:11|
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