Asymmetric technological distance measure based on language model

Katsuyuki Tanaka, Takuji Kinkyo and Shigeyuki Hamori

Applied Economics Letters, 2019, vol. 26, issue 18, 1548-1551

Abstract: This article introduces a novel technological distance measure between companies based on their patent portfolios. We describe the technological position or characteristics of companies by applying the framework of language modelling technique in information retrieval on their patent portfolios. The proposed novel approach is an asymmetric measure and better captures the technological characteristic of a company and hence is a more accurate distance measure.

Date: 2019
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DOI: 10.1080/13504851.2019.1584364

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