Workers’ replacements and firms’ innovation dynamics: New evidence from Italian matched longitudinal data     

《Research Policy》2019,48(9):103804

In this paper, we explore the impact of a firm's workers’ replacements on innovation performance by using rich matched employer–employee panel data for the Veneto region of Italy. We take the well-known resource-based theory of the firm as our departure point, and develop a set of hypotheses which we test empirically with negative binomial regressions. We find that workers’ replacements significantly dampen innovation performance, coherently with the idea that they generate losses in the tacit knowledge base of the firm. We also find that workers’ replacements are especially detrimental to large and young firms, possibly because large companies benefit comparatively less from ‘diaspora’ effects and because innovative capabilities in young firms are mostly dependent on specific human capital. Finally, our results show that firms’ location in industrial districts significantly mitigates the negative impact of workers’ replacements, and that a similar picture emerges when firms are more exposed to knowledge spillovers, particularly of related knowledge.  相似文献   

疫霉菌群体遗传结构变化机制研究进展   总被引：1，自引：0，他引：1  

王子迎 《安徽教育学院学报》2006,24(6):89-93,108

群体遗传结构是影响群体进化的各种因素相互作用的结果,体现了群体进化的历史,而且在一定程度上还可以反映该群体未来的进化潜能。对于疫霉菌,由于其生物学特性和研究技术的限制,疫霉菌群体遗传结构研究的进展比较缓慢。本综述回顾了近期关于疫霉菌群体遗传结构的相关进展,分析了疫霉菌群体结构变化的机制。重点论述了种群的变异、迁移、遗传漂变及选择等四个方面对种群遗传结构变化的影响,分析了在影响群体遗传结构变化的各种因素的作用下,群体原来的基因型被新的基因型所替换而造成群体结构快速转变的现象及其机制。  相似文献