ソーシャルキャピタルと研究業績

中本龍市(2010)「ソーシャルキャピタルと研究業績：医薬品の基礎研究者の分析」『医療と社会』
　The aim of this research is to investigate the impact of social network structure of researchers on their performance. Although many researchers in management studies are interested in the effects of social structure, there has been little research in this area because of difficulties of access. This research focuses on basic drug research and analyzes the relationship between the social structure of researchers and their performance.

I focused on two of the largest pharmaceutical firms in Japan as of 1980: Takeda pharmaceutical and Sankyo. Using patent data from 1980 to 1999, I induced social relationships among researchers. Based on this data, I made network structure variables and network ties variables to test how these variables affected researchers’ performance. Additionally, I divided the data into two periods: 1980s and 1990s in order to determine causal relationship.

According to the results, past betweeness centrality and the number of current strong ties have positive impacts on researchers’ performance. However, current network constraint and the number of past strong ties have negative impacts on researchers’ performance. I conclude that the effects of network structure and network ties are varied in accordance with times.

Keywords: Social network analysis, basic research, patent