Construction of Knowledge Production Map of Japan based on Patents

关于知识生产机制的研究有很多。然而，研究人员地理分布对知识生产的影响却鲜有证据。本研究试图利用发明人的专利记录，绘制“日本知识生产地图”。它不仅包括发明者的地址，还包括他们的从属关系。为了补充专利信息的不足，将发明者的记录与其他数据库进行比较，如KAKEN数据库，其中包括日本几乎所有的学术研究人员。这张地图能够证明日本与大学和私营企业的合作研究在数量上有所增加，但在质量上有所下降，地理距离和组织距离对合作研究的影响因行业而异。

There are so many efforts fo elucidate the mechanisms of knowledge production. However, there is a little evicence about the effects of geographical distribution of researchers on knowledge production. This study challenged to make the "Knowledge productin map of Japan" by using inventors' records on patents. It included not only inventors' adddresses but also their affiliations. For complementing the deficit information of patents, comparing inventors' records with other databases such as the KAKEN database, which inculudes almost all academic researchers in Japan. This map enabled to demonstrate that the collaborative research with universities and private firms in Japan augmented in volume, but depressed in quality, and effects of geographical distance and organizational deistance on collavorative research were different from industry to industry.