论文信息 - Stochastic model for innovation and resulting skew distribution for technological concentration with verification in Japanese industry

Stochastic model for innovation and resulting skew distribution for technological concentration with verification in Japanese industry

Technological resources are shown to be more concentrated to a few firms than economic wealth. To explain such concentrations, the self-multiplication process with cycle between the innovative and stagnant ages is modeled in terms of the stochastic process. This yields a family of new distributions which is named the ultra-Yule distribution. This new distribution which is quite skew is show to fit the real distributions of patents and of R & D expenditure in the Japanese industry better than the Yule distribution. The properties of this new distribution is discussed.

Hajime Eto | K. Makino

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