关键词: 薪酬税收激励, 劳动收入份额, 双重差分法, 高质量发展

Abstract: Most of China's preferential tax policies to promote high-quality development are biased towards encouraging enterprises to use capital factors，while relatively few encourage enterprises to use labor factors Literatures find that although the former type of tax preference can improve the production efficiency of enterprises，but they usually have an unexpected negative impact on the share of labor income What is the impact of the latter type of tax preference? Clarifying this issue is of great significance for promoting common prosperity in highquality development
Based on the quasi-natural experiment of the 2008 salary tax credit reform，this paper selects the annual data of China's non-financial Ashare listed companies from 2003 to 2014，empirically analyzes how salary tax incentives affect labor income share and enterprise production efficiency by differenceindifference，and constructs a mathematical model to derive the mechanism The empirical analysis shows as follows:First，the salary tax incentive imposed by the salary tax credit reform can increase the share of labor income，and the increase rate at the sample mean is about 462% Second，the salary tax incentives promote enterprises to improve their remuneration packages，and the benefit of ordinary employees is significantly greater than that of management Third，the salary tax incentives have a significant positive impact on the production efficiency of enterprises，which is mainly manifested in improving the labor productivity and per capita performance of enterprises
The above empirical analysis results have passed a series of robustness tests，such as using alternative variable measures，conducting PSMDID regressions，and conducting placebo test，etc On the whole，the salary tax incentives imposed by the salary tax credit reform are conducive to increasing the share of labor income on one hand，and have a positive impact on the production efficiency and efficiency of enterprises on the other hand The findings implicate that tax preference encouraging enterprises to use labor factors ultimately promotes the transformation and upgrading of enterprises to a highquality and highefficiency structure，and can better balance the goals of common prosperity and highquality development
Based on the above findings，this paper puts forward the following policy suggestions for the adjustment direction and focus of China's future preferential tax policies:First，government optimize the structure of tax policies and appropriately increase the preferential tax policies to encourage the input of labor factors of market entities Second，it is necessary to use the preferential tax policies for market entities and the preferential tax policies for individual workers simultaneously Third，policy makers adhere to the system concept and enhance the synergy between preferential tax policy tools and other types of policy tools

Key words: compensation tax incentives, labor income share, difference-in-difference, high-quality development