异质性雇用成本、社会福利与劳动力市场结构性改革

Heterogeneous Hiring Costs,Social Welfare and Structural Reform in Labor Market

通过扩展Blanchard和Galí(2010)的雇用成本模型,文章构建了一个包含正规部门与非正规部门的异质性雇用成本的NKMP-DSGE模型。外生冲击的贝叶斯脉冲响应函数表明,正规部门就业与非正规部门就业对于同一外生冲击具有不同的反应,这意味着考虑不同部门的异质性是合理的。社会福利分析的结果指出,非正规部门的存在尽管通过降低名义价格刚性而改善了社会福利,但通过失业回滞却导致了社会福利的恶化;而且总体而言恶化了社会福利。这一发现为我国当前正在积极推行的劳动力市场结构性改革提供了理论依据。在此基础上,文章进一步考察了劳动力市场结构性改革的效应。研究发现,不管是长期效应还是短期效应,改革都有利于改善劳动力市场的表现。

By extended hiring cost model provided by Blanchard and Galíin 2010,thispaper constructs a NKMP-DSGE model including heterogeneous hiring costs in formal and informal sectors.The Bayesian impulse response function of exogenous shocks shows that employment in formal and informal sectors has different responses to the same exogenous shock,meaning the rationality of the consideration of the heterogeneity of different sectors.The results of social welfare analysis indicate that the existence of informal sector improves social welfare through the reduction in nominal price rigidity,but leads to the deterioration of social welfare through unemployment hysteresis.And as a whole,the existence of informal sector worsens social welfare.This finding provides theoretical reference for current actively ongoing structural reform in labor market.It further investigates the effect of structural reform in labor market.It points out that the reform is conducive to the improvement of the performance of labor market whether in the long run or in the short run.