Abstract
Academic landscape of innovation research was analyzed by citation network analysis, which was divided into three main clusters; with "technological innovation" as the central core together with "innovation fundamentals" and "innovation management". Historically, research on innovation started from innovation management, such as innovational organization research, but research in the other two cluster areas is currently more active. With this background, we prepared a historical overview of national innovation system policy in Japan and the United States. Finally, we compared the trend of global innovation research with that of the national innovation systems in Japan and the United States.
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