人力资本的社会收益是各国政治家、经济学家和发展战略家都十分关注的问题,但由于人力资本的不可触摸性、投资和收益的长期性,及其数据支撑的缺乏性,我国并未对此问题展开卓有成效的实证研究。本文从人力资本价值估算的成本法和收入法寻找到新的数据来源支撑人力资本社会收益估算,并将内部收益率法和净现值结合,修正了内部收益率法,提出了"差分回报"计算人力资本社会收益的方法。估算了1995-2009年全国及代表性省份的人力资本收益总额及其收益率水平。结果表明,15年来全国及各省份人力资本投资收益额只有小幅增长,而收益率则呈下降趋势,全国及代表省份人力资本投资收益额与GDP之比的下降幅度更为显著。
Social returns to human capital investment are always important issue to all politicians, strategist and economists. Owning to the characteristics of human capital, being short of useful statistic data, few empirical researches is done on this topic. This paper searches out new data to support empirical study, and estimates social returns to human capital in China and some of its provinces, the result reveals that social returns to human capital investment increased by only a small scale, the ratio of social returns to GDP declined sharply in the past15 years.