数字服务贸易与国家创新能力：基于收入差距的中介效应研究

作为一种新的贸易形态与商业模式，数字服务贸易在推动国家创新发展中的作用愈发显现。本文基于2011-2019年全球66个国家的面板数据，就数字服务贸易对国家创新能力的影响作用进行了实证研究，探讨收入差距在二者之间可能发挥的作用，并基于不同经济发展水平的国家样本展开了异质性分析。结果表明：数字服务贸易对国家创新能力的提升具有显著的正向影响；收入差距在二者之间发挥部分中介作用；高收入国家发展数字服务贸易对国家创新能力的显著提升作用更强，而中等收入国家受限于经济发展所处阶段，一定的收入差距可以阶段性地提升国家创新能力。为此，包括我国在内的中等收入国家需要在既定发展条件下，通过改革收入分配制度，推动数字服务贸易与收入差距协调发展，进而共同促进国家创新能力的提升。

Digital Service Trade and National Innovation Capacity: Based on the Mediating Effect of Income Gap

As a new form of trade and business model, digital service trade is becoming more and more important in promoting the development of national innovation. Based on the panel data of 66 countries in the world in 2019, the effect of digital service trade on national innovation ability is carried out, and the role of income gap is discussed, and the heterogeneity analysis of national samples based on different economic development levels is carried out. The results show that digital service trade has a significant positive effect on the improvement of national innovation ability. The income gap plays a partial intermediary role between the two. The development of digital service trade in high-income countries is more important to the ability of national innovation, while middle-income countries are limited to the stage of economic development, and a certain degree of income gap income gap can improve the ability of national innovation. To this end, the middle-income countries, including China, need to reform the distribution of income, promote the development of digital service trade and income gap, and promote the promotion of national innovation ability.