异质性、自选择偏差和教育收益率

Heterogeneity,self-Selection Bias and Return to Education

采用广义选择修正法,在考虑异质性和自选择偏差问题基础之上,结合最新的调查数据,评估了我国2006年高等教育收益率,并与传统模型下的研究结果进行了比较.同时还分析了其他非实验数据效应评估模型在本文的适用性.研究结果表明,随着经济改革深化和劳动市场的完善,2006年的高等教育收益率较之前有了显著的提高.另外,还发现可观察的异质性不明显,但不可观察的异质性和自选择偏差选择显著存在,且人们会根据自己的比较优势选择是否接受高等教育.

Employing latest survey data, this paper adopts generalized selection correction method which allows heterogeneity and self-selection bias problem, to estimate the return to college education of 2006. Meanwhile, we compare our results with traditional model and analyze the applicability of other non-experimental evaluation method. We find the return to college for 2006 has increased substantially with the deeply economic reform and development of labor market. In addition, there is no significantly observable heterogeneity, but evidently unobservable heterogeneity and self-selection bias, and people sort into schooling on the basis of the principle of comparative advantage.