Abstract: This article employs a difference-in-differences model based on the implementation of the Supply Chain Innovation and Application Pilot Policy to, for the first time, quantitatively assess the impact of smart supply chain development on firms’ labor income share from the perspective of external digitalization. The empirical results reveal that the construction of smart supply chains significantly reduces the labor income share within firms. This effect is more pronounced among non-state-owned enterprises, labor-intensive firms, upstream enterprises, firms with higher levels of internal control, and those with weaker supply chain linkages. Mechanism analysis indicates that the negative impact primarily operates through two channels: the information effect and the technology substitution effect. Further investigation suggests that smart supply chain development alleviates excessive labor investment by reducing firms’ demand for redundant labor, thereby enhancing labor investment efficiency. The findings of this study offer novel theoretical insights and empirical evidence for the modernization of supply chains and the optimization of income distribution structures.

Key words: Smart Supply Chain, Labor Income Share, Information Effects, Technological Substitution Effects

摘要： 本文利用供应链创新与应用试点政策构建双重差分模型,从外部数字化的视角量化评估智慧供应链建设对企业劳动收入份额的影响。研究结果发现,智慧供应链建设显著降低企业劳动收入份额,这一效应在非国有企业、劳动密集型企业、上游企业、内部控制水平较高的企业及供应链关系紧密度较低的企业中更明显,并主要通过信息效应和技术替代效应两个机制来实现。此外,智慧供应链建设减少企业对冗余劳动力的需求,缓解企业劳动投资过度,从而改善企业的劳动投资效率。上述结论为构建现代化供应链、优化收入分配格局提供了新的理论参考和经验证据。

关键词: 智慧供应链, 劳动收入份额, 信息效应, 技术替代效应