# How Does the Global Network of Research Collaboration Affect the Quality of Innovation?

執筆者 飯野 隆史 (新潟大学)／井上 寛康 (兵庫県立大学)／齊藤 有希子 (上席研究員)／戸堂 康之 (ファカルティフェロー) 2018年10月  18-E-070 企業の国際・国内ネットワークに関する研究

## 概要

これは、アメリカ企業が様々なタイプのつながりから恩恵を受けているのと対照的であり、日本を含めた多くの国で共同研究を通じた知識伝播によってイノベーションの質的パフォーマンスを向上させるのが容易でないことを示唆している。

（本稿は、日本語版のディスカッション・ペーパー（17-J-034）に加筆修正を行った上で、英語版にしたものである）

## 概要（英語）

This study examines how the research collaboration of firms affects the quality of their innovation outcomes using comprehensive patent data for firms in the world from 1991 to 2010. Identifying research collaboration by co-patenting relationships, we find that research collaboration with other firms, particularly with foreign firms, leads to substantial improvement in innovation quality. We also observe an inverted U-shaped effect of the density of a firm's ego network and a positive effect of brokerage in the global network, especially for firms with international collaboration experiences. These results are applicable to the effect on the quality of innovation achieved individually without any collaboration, suggesting that the knowledge of firms diffuses to and is acquired by their collaboration partners. Finally, we find that the collaboration effect is larger in the 2000s than in the 1990s and varies across countries.

Published: Iino, Takashi, Hiroyasu Inoue, Yukiko Umeno Saito, and Yasuyuki Todo, 2021. "How does the global network of research collaboration affect the quality of innovation?" Japanese Economic Review, Vol. 72(1), 5-48.