中文摘要：

近年来，中国参与全球化的程度日益加深，表现之一是外包活动增加。外包对劳动力市场的影响可能会更多地体现在对劳动力需求弹性的影响，而并非仅仅改变劳动力价格。从理论和实证两个层面，笔者分析了外包对我国总体劳动力需求弹性的影响，并进一步深入探讨了外包对我国不同技能水平的劳动力——熟练劳动力和非熟练劳动力需求弹性的影响。基于我国1994年、1997年、2000年、2003年和2006年行业面板数据的实证分析表明，外包能够降低总体劳动力需求弹性，提高熟练劳动力需求弹性，降低非熟练劳动力需求弹性，这与理论预期基本一致。笔者认为，即使外包对我国工业行业工资和就业的直接影响不明显，但其仍会通过影响劳动力需求弹性作用于我国工业部门的劳动者。

英文摘要：

China＇s economy has recently become more integrated into the world economy, accompanied by more outsourcing activities. Outsourcing may affect the labor market by changing the labor demand elasticity rather than labor price. This paper analyzes the impact of outsourcing on the demand elasticity of aggregate labor force the- oretically and empirically, then further studies outsourcing＇s effect on labor of different skill level （ skilled and un- skilled labor）. The empirical analysis based on China＇s panel data of 1994, 1997, 2000, 2003 and 2006 shows that outsourcing reduces the demand elasticity of aggregate labor and unskilled labor, but increases that of skilled labor. The empirical results support the prediction of theoretical analysis. It could be implied that even if outsourcing does not change the wage and employment in China＇s labor market obviously, it may still affect the labor through the la- bor demand elasticity effect.