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将中小企业作为典型研究对象,利用中国工业企业微观数据库的大样本数据,从微观层面估算了中小企业的全要素生产率(TFP),并实证研究了R&D投资对TFP作用的创新效应。研究表明:中小企业R&D投资对TFP的提升在统计上具有显著的正向效应,但这种正向效应会随企业自身资本规模变化而变化;并且对单个企业来说,最优R&D投资水平与企业的资本规模呈反向关系;再者R&D投资对企业TFP的提升存在滞后效应,不能提升当期的TFP。
Taking SMEs as a typical research object, this paper estimates the total factor productivity of small and medium-sized enterprises (TFP) from a micro perspective using the large sample data of China’s industrial enterprise micro-databases and empirically studies the innovative effects of R & D investment on TFP. The research shows that the promotion of TFP by SMEs’ R & D investment has a statistically significant positive effect, but this positive effect will change with the change of enterprise’s own capital scale. And for a single enterprise, the optimal R & D investment level and The capital scale of the enterprises is in a reverse relationship; furthermore, the R & D investment has a lagging effect on the promotion of the TFP of enterprises and can not enhance the current TFP.