中文摘要：

以往研究对于产学研合作与企业内部独立研发的互动关系，存在“替代性”和“互补性”的结论冲突，其原因之一在于未充分考虑企业研发模式有机结合之间的情境变量影响。通过构建门槛效应模型，实证检验了企业R＆D投入在产学研合作与企业内部独立研发间的情境作用，并对其门槛效应进行了研究。结果表明，企业R＆D投入不仅对产学研合作和企业内部研发的模式选择产生影响，而且会对其互动关系产生门槛效应。其中，企业R＆D投入在技术密集型行业和资本密集型行业中发挥互补性门槛作用，而在劳动力密集型行业则具有替代性门槛作用。

英文摘要：

Previous studies have conflict conclusions of the ＂alternative＂ and ＂ complementary＂ interaction between enterprise inde- pendent research and University- Industry Cooperation （UIC）. One of the reasons is not fully consider the impact of contextual varia- bles in the organic integration between enterprise R＆D modes. In this study, the context role and threshold effect of enterprise R＆D in- vestment between enterprise R＆D modes is test empirically by constructing a threshold effect model. The results show that R＆D invest- ment not only has impact on the selection of research mode, but also have the threshold effect on the interaction between enterprise in- dependeu｜ research and UIC. Among them, R＆D investment plays a complementary threshold role in technology - intensive industries and capital - intensive industry, but an alternative threshold role in the labor - intensive industry.