Jack of fewer trades: Evolution of specialization in research
利用韩国发明家面板数据，研究年轻一代发明家是否更专业化，以及专业化程度如何随职业生涯演变、技术领域切换距离如何变化。
Abstract It is widely maintained that scientists have become increasingly specialized with a narrow range of expertise ever since the era of “Renaissance men.” However, evidence on scientists' specialization is rather anecdotal. We provide large‐scale evidence to address whether younger generations of inventors have indeed become more specialized, using a unique panel data set of Korean inventors. We also investigate how the degree of specialization evolves over an inventor's research career and how far an inventor switches his or her field of expertise in the technology space over a career.