国际研发投资同时通过影响东道国R&D资源的配置效率、研发投资水平和研发人员素质及研发全要素生产率三个渠道作用于东道国的技术创新能力。基于2000—2012年跨国研发数据，利用路径收敛设计，对上述影响机制在高收入和低收入国家之间进行了比较实证分析，检验了国际研发投资对低收入国家技术创新效率的影响。研究发现，国际研发投资降低了低收入国家自主研发投资水平，同时提升了单位研发资本的产出能力，但总体上还是不利于低收入国家研发全要素生产率的提升。低收入国家长期实施居民低收入和出口导向型的高增长战略，不利于国内市场升级、人力资本积累及企业家精神培育，使其短期内难以顺利获取国际研发投资对其技术创新的正向外溢效应。未来应建立以自主创新为基础的国际研发合作模式，以赢得国际研发投资的技术创新效率促进作用。

In order to accord with the two principles of generalizeness and uniqueness, the paper has analyzed the effectives of international R&D on host countries’ R&D productivity and mechanism with the path converged design based on OECD, EU15 and other 8 countries during 2000-2012. The paper has discovered that crowding-out effect of international R&D on host countries domestic R&D investment is the leading cause, otherwise the factor productivity effect based on comparing the empirical result between high income countries and the low income countries. Crowding-out effect comes from the inhibiting effect on entrepreneurial spirit of host countries of international R&D and then through the crowding –out effect the international R&D could decrease the factor productivity for R&D.