中文摘要：

从劳动力需求弹性的视角研究中美贸易对美国劳动力市场的影响，利用1997--2009年中美双边贸易数据和美国制造业行业数据，从理论分析和实证验证的角度进行探讨。研究发现，中美贸易对美国劳动力需求弹性变化有重要影响，美国向中国出口有利于降低劳动力需求弹性，美国从中国进口有利于提高劳动力需求弹性，净进口最终将带来劳动力需求弹性的提升。区分技能工人和非技能工人之后，净进口不论从替代效应角度还是从规模效应角度均将导致美国工业行业工人劳动力需求弹性增强。

英文摘要：

This paper studies the impact of Sino-US trade on the US labor market from a new perspective of labor demand elasticity. By using 1997 to 2009 bilateral trade data and the Annual Survey of Manufactures of America, we discussed through theoretical analysis and empirical verifi- cation. The study shows that Sino-US trade is an important factor affecting the American industrial labor demand elasticity. US exports to China help to decrease the labor demand elasticity, while the imports increase it, and the net imports ultimately enhance the elasticity of labor demand . After di- viding labor into skilled worker and unskilled worker, the results indicate that net imports from China have increased elasticity of labor demand through substitution effects and scale effect.