Related diversification of high-quality technologies within Chinese cities
研究了2000-2015年中国城市内高质量技术的多样化过程，发现高质量和低质量技术组合共同促进多样化，其中高质量组合主导，低质量组合通过本地知识深化起补充作用，且技术相关性与区域间溢出效应可相互替代。
This study explores the diversification of high-quality technologies within Chinese cities from 2000 to 2015. Our results reveal that both high-quality and low-quality technological portfolios contribute to high-quality technological diversification. High-quality portfolios dominate this process as provide high-value knowledge that can be shared with new related technologies. Meanwhile, low-quality portfolios play a complementary role in this process by facilitating local knowledge deepening, in which existing low-value knowledge gradually evolves into high-value one through local interaction. Moreover, technological relatedness and interregional spillovers are substitutable when contributing to the diversification of high-quality technologies.