在校工作经验对教育收益的影响——基于哈尔滨市劳动力市场问卷调查的分析

In-school Work Experience Effects on the Returns to Schooling——Based on Questionnaire from Harbin Labor Market

由于学生在校期间往往通过兼职行为获得一定的工作经验,导致采用传统人力资本收入函数估算的教育收益率存在偏差,为了消除教育收益率偏差,使用典型地区劳动力市场问卷调查数据,估算两个收入函数——含有在校工作经验变量的人力资本收入函数和不含有在校工作经验变量的传统人力资本收入函数。估算结果显示,后者较前者在教育投资回报系数上高出8%左右,这一结果表明传统人力资本收入函数过分夸大了教育对工资的影响。

Students often accumulate substantial work experience before leaving school. Be- cause conventional human capital earning functions do not control for in-school work experi- ence, their estimates of the return to schooling include the benefit of work experience gained a- long the way. Using data from questionaire, this paper estimates earning functions with and without controls for in-school work experience. The estimated schooling coefficients are 8% higher when in-school work experience is omitted than when it is included. These findings indi- cate that conventional models significantly overstate the wage effects of school.