Penetrating the Knowledge Filter in the Rust BeltZoltan J Acs,Lawrence A Plummer,Ryan SutterSSRN Electronic Journal(2007)引用 5|浏览3暂无评分关键词entrepreneurship,knowledge,economic growth,cross section,endogenous growthAI 理解论文溯源树样例生成溯源树,研究论文发展脉络Chat Paper正在生成论文摘要