垄断竞争、产业内贸易与相对工资差距

本文首先运用理论模型推导出垄断竞争市场条件下产业内贸易与行业相对工资差距之间的关系。理论结果显示,当产品的产出技能替代弹性(高技术工人相对雇佣量的变化率/产出的变化率)为正时,产业内贸易将会扩大相对工资差距;当产品的产出技能替代弹性为负时,产业内贸易将会缩小相对工资差距。然后以中美工业制成品产业内贸易为例对该结论进行验证,计量检验结果表明,我国制成品的产出技能替代弹性为正,中美工业制成品产业内贸易扩大了相对工资差距。

Monopolistic Competition,Intra-Industry Trade and the Relative Wage Gap

This paper first studies the relationship between intra-industry trade and the relative wage gap theoretically in markets characterized by monopolistic competition.The result shows that,if the output elasticity of substitution(the percentage change in the ratio from high-skilled to low-skilled labor demanded brought about by a percent change in output)is positive,intra-industry trade will expand the relative wage gap;otherwise,intra-industry trade will reduce the relative wage gap.Then the paper verifies the conclusion on the basis of Sino-U.S.intra-industry trade of manufactured goods through quantitative analysis,it finds that the output elasticity of substitution of manufactured goods is positive,Sino-U.S.intra-industry trade expanded the relative wage gap.