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凝聚高质量发展的强大动能，切实推进共同富裕取得更为明显的实质性进展。共同富裕是中国式现代化的重要特征，核心任务是缩小区域、城乡和收入差距，推动社会公平与包容性发展。作为全面建设社会主义现代化国家的首要任务，高质量发展最主要的宗旨就是满足人民日益增长的美好生活需要。习近平总书记强调，“在高质量发展中促进共同富裕”，这不仅为推进中国式现代化提供了理论指引，也体现了马克思主义中国化、时代化的创新成果。高质量发展是实现共同富裕的总抓手，因此本文主要研究现阶段高质量发展对共同富裕的推进效应、调节效应和异质性影响，并运用Kernel密度估计、Markov链分析、Dagum基尼系数法分析高质量发展的动态分布、差异性等演进特征；以β收敛模型测度共同富裕的收敛情况以及高质量发展对其的影响效应。

通过测算分析，本文得出以下实证结论：（1）2012—2023年间，中国31个省（市、区，除港澳台）的高质量发展建设成效显著，但在增长速度和发展水平上存在地区差异。高质量发展低水平地区的平稳转移概率逐年增强，展示出我国高质量发展建设稳中向好的演进趋势。（2）β收敛模型结果表明，共同富裕各指标的绝对收敛趋势较为显著，相对而言，条件收敛的显著性较强，收敛速度有所提升，存在“优化型收敛”趋势。（3）实证结果表明，高质量发展有利于维护并提升现有的共同富裕成效，能有效促进城乡收入比值和地区收入不平等程度的收敛，并降低区域间的社会保障差距。稳健性和内生性检验结果肯定了基准回归结果的可靠性。市场的调节作用在短期内会降低高质量发展缩小收入差异的效果，而政府的调节作用会提升高质量发展对共同富裕差距的收敛效果。

最后，本文针对上述实证结论，提出了相对可行的建议，例如从平衡地区高质量发展差异、促进中西部地区共同富裕、发挥市场和政府效能等方面着手，促进马克思主义中国化理论的实践应用，为推动全面建设社会主义现代化国家提供理论参考。

The strong momentum of high-quality development is consolidating, making substantial progress in promoting common prosperity. Common prosperity is an essential feature of Chinese-style modernization, its core task is to narrow regional, urban-rural, and income gaps, and promote social fairness and inclusive development. As the primary task in the comprehensive construction of a socialist modern country, the main objective of high-quality development is to meet the growing demands of the people for a better life. President Xi Jinping emphasizes that "Promoting common prosperity through high-quality development." This not only provides theoretical guidance for advancing Chinese-style modernization but also reflects the innovative achievements of the Marxism’s sinicization and modernization. High-quality development serves as the key driver for achieving common prosperity. Therefore, this paper mainly studies the effects, moderating effects, and heterogeneity of high-quality development on promoting common prosperity under the context of Chinese-style modernization. It employs Kernel density estimation, Markov chain analysis, and Dagum Gini coefficient method to analyze the dynamic distribution, differences, and other evolutionary characteristics of high-quality development; and uses the β-convergence model to measure the convergence of common prosperity and the effect of high-quality development on it.

Through calculation and analysis, the paper draws the following empirical conclusions: (Ⅰ) Between 2012 and 2023, the construction of high-quality development in the 31 provinces (municipalities, regions, excluding Hong Kong, Macau, and Taiwan) in China has shown remarkable results, but there are regional differences in growth speed and development level. The steady transition probability of low-level regions in high-quality development has increased year by year, demonstrating a steady improvement trend in China’s high-quality development process. (2) The results of the β convergence model indicate a significant absolute convergence trend for each indicator of common prosperity. Relatively, the significance of conditional convergence has strengthened, the convergence speed has increased and shown an "optimization convergence" trend. (3) Empirical results show that high-quality development is beneficial in maintaining and enhancing the existing results of common prosperity. It effectively promoting the convergence of urban-rural income ratios and regional income inequality, reducing the social security gap between regions. The reliability of the benchmark regression results is confirmed by the results of robustness and endogeneity tests. Market regulation will reduce the effect of high-quality development on narrowing income disparities in the short term, while government regulation will amplify the convergence effect of high-quality development on reducing the common prosperity gap.

Finally, based on the above empirical conclusions, this paper proposes relatively feasible suggestions, such as balancing regional disparities in high-quality development, promoting common prosperity in central and western regions, and leveraging the effectiveness of both the market and the government. These suggestions aim to facilitate the practical application of Marxism in China’s context and provide theoretical references for advancing the comprehensive construction of a socialist modern country.