Innovation and intangible investment in Europe, Japan and the USJonathan Haskel,Carol Corrado,Cecilia Jonalasinio,Massimiliano Iommimag(2013)引用 31|浏览15暂无评分AI 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