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双循环
当今世界处于百年未有之大变局的历史转折时期，站在历史高度前瞻国际贸易高质量发展，应深刻认识中国对外贸易的潜在优势和发展机遇。出口产品质量提高是否有助于缓解收入不平等，针对这一问题的研究有助于进一步厘清中国贸易出口推动收入差距缩小的内在机理，成为实现共同富裕的内在动力。本报告基于2000～2018年中国海关统计数据，评估了出口产品质量对收入不平等的因果效应，并识别了潜在的影响机制，研究结果表明：①出口产品质量每提高1单位，收入不平等就上升0。12～0。14个百分点，即出口产品质量上升加剧了收入不平等；②考虑内生性问题的研究结果表明上述结果具有稳健性；③在影响机制方面，一方面通过模仿与创新，掌握不同技术水平的劳动群体所获工资不同，从而扩大收入差距，加剧收入不平等；另一方面在贸易放开与市场竞争环境下，劳动力要素流动是影响部门间收入差距的重要影响因素。
<<Today’s world is at a historical turning point in a century of great changes. Looking forward to the high-quality development of international trade from a historical height，we should deeply understand the potential advantages and development opportunities of China’s foreign trade. Does improving the quality of export products help alleviate income inequality？The research on this issue will help to further clarify the internal mechanism of China’s trade and export to narrow the income gap，and become the internal driving force to achieve common prosperity. Based on the statistical data of China’s customs from 2000 to 2018，this paper evaluates the causal effect of export product quality on income inequality，and identifies the potential impact mechanism.
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