Development of Japanese Patent Stock and Citation-Weighted Patent Stock-An Application of HJT Model to Japanese Patent Data- (in Japanese)

Setsuo Yamada

Economic Analysis, 2008, vol. 180, 65-80

Abstract: This paper develops patent stock and citation-weighted patent stock using Japanese patent data. In constructing database, I refer to the method of the correction of truncation bias by Hall, Jaffe and Trajtenberg(2000,2001). However, due to the differences in patent systems between Japan and the United States, I cannot simply apply the method to Japanese data. I had to adjust the method suitable for Japanese patent system. In addition, I estimate the Cobb-Douglas production function including Japanese patent stock and citation-weighted patent stock obtaining significant results.

Date: 2008
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