科创企业研发投入对企业绩效的非线性影响——基于固定效应面板门槛模型的实证研究
赵毅, 王楠, 张陆洋
科创企业研发投入对企业绩效的非线性影响——基于固定效应面板门槛模型的实证研究
The Non-linear Effect of R&D Input on Enterprise Performance in Sci-Tech Innovation Enterprises——An Empirical Research Based on the Fixed-Effect Panel Threshold Model
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