关键词: 市场准入管制, 劳动收入份额, 市场准入负面清单

Abstract: China has created a liberalized market environment by improving market access regulations and providing favorable conditions for business operationsWhile deregulating market access stimulates market vitality，the equitable distribution of development gains remains a critical issueLabor income share，which measures the proportion of national income allocated to labor，reflects the fairness of income distributionIncreasing labor income share is crucial to ensuring that workers fairly share in economic development gainsWe employ the market access negative list system as a quasinatural experiment and constructs a DID model to empirically examine the impact and mechanisms of deregulating market access on firms labor income shares
The findings indicate that deregulating market access significantly enhances firms labor income sharesThis conclusion holds robustly across parallel trend tests，heterogeneous treatment effect analyses，and considerations of the nonrandomness of policy pilotsImportantly，this increase does not result from the redistribution of labor income among firmsMechanism analysis reveals that deregulation directly facilitates the entry of market entities，which，in turn，enhances firms labor income shares by affecting their monopoly power，innovation investments，and investment activitiesFurther research shows that the primary source of increased labor income share is the improvement in wages for highskilled employees rather than an increase in their numbersMoreover，deregulating market access promotes fair income distribution among labor factors within firms，thereby reducing income disparitiesHeterogeneity analysis demonstrates that the positive impact of deregulating market access on labor income shares is more pronounced for firms in regions with high levels of government intervention，manufacturing firms，and nonstateowned enterprises
The marginal contributions of this study are as follows：First，it integrates the market access negative list system with firms labor income shares within a unified analytical framework，linking market access regulations with internal income distribution in firms and enriching the literature on market access systemsSecond，from the perspective of market institutions，it broadens the research on factors influencing firms labor income sharesExisting studies have yet to focus on the impact of market access regulations on labor income sharesBy examining the market access negative list systems role in enhancing labor income shares，this study provides new insights for adjusting income distribution and improving labor remuneration
Theoretical and empirical evidence from this study reveals that deregulating market access is a significant factor influencing firms labor income shares，offering clear policy implicationsThe Chinese government should further deepen the market access negative list system，enhance highlevel coordination，and continuously and thoroughly promote the implementation of the “nonprohibited entry” principleThis will help build a higherlevel market economy system and continuously unleash market vitality

Key words: deregulation of market access, negative list for market access, labor income share