Public infrastructure provision and skilled–unskilled wage inequality in developing countries

In this paper, we develop several static three-sector general equilibrium models with diverse labor market structures to investigate the effects of government provision of public infrastructure on the skilled–unskilled wage inequality in developing countries. The basic full employment model shows that the production sectors' relative dependence on the public infrastructure provision plays a crucial role in determining the skilled–unskilled wage inequality. Different relative dependences on public infrastructure may even result in opposite changes in the skilled–unskilled wage inequality. The above results are robust even when we extend the basic full employment model to three fundamentally different cases.     

在青岛采访是享受

从十一运花样滑冰的比赛采访归来,回到济南,乘坐号称"快速公交"的BRT回家的路上,才发现自己有多么想念青岛的公交.从繁华的香港中路到国信体育场,竟然一路上能有座位、不堵车,在这我简直可以说是奢侈.     

单供应商——单销售商两级供应链批量模型及算法研究

针对单供应商-单销售商两级供应链,建立了“批对批”、等量延迟送货和等量非延迟3种生产-补货模型,研究了供应链上下游企业在集中式决策和分散式决策下的最优决策策略.给出了各种情形下供应商和销售商各自的最优决策以及与之相对应的库存水平和供应链系统总成本函数.最后通过数值仿真实验分析了模型的最优解特性并对结论做了进一步的说明.     

企业兼并重组的文化机制研究

企业重组过程有着复杂的动机,但其过程表现为混沌动力学过程,其实质则是文化重组或文化基因的重新构造和复制。由此提出企业重组的文化机制建设问题,包括战略性的文化DNA识别机制、测试机制、复制机制、维护机制和整合机制,以及起辅助作用的容错机制和反馈机制,从而形成动态的文化整合机制。     

The spillover effects of biofuel policy on participation in the conservation reserve program

This paper studies the spillover effects of rising biofuel production on participation in the Conservation Reserve Program. Landowner participation decisions are modeled using a real options framework. We develop a land use decision model that captures biofuel-driven structural changes in market demand and derive threshold conditions that trigger participation in the program. We then quantify the impacts of biofuel production on participation at both the national and state levels using Monte Carlo simulations. The model is also used to analyze how changes in the persistence of the biofuel production boom and in the volatility of farming returns affect conservation participation decisions. Policy implications of the results are discussed.     

皖南山区养老状况和养老机制研究——以黄山市黟县四镇为例

通过对安徽黄山黟县四镇进行实地调查,分析总结出皖南山区养老的基本情况,提出了优化皖南山区农村养老机制的设想。     

政府促进农民工就业机制研究——以保定市为例

农民工为我国的社会主义建设做出了巨大的贡献,但农民工的权利和利益长期被忽视,产生了一系列社会问题。尤其是2008年全球金融危机的爆发,大量农民工返乡,出现了大规模的农民工就业难题。为此,本文结合保定市农民工就业的具体情况,探讨政府促进农民工就业的长效机制。     

以求真务实创新的精神统领工会工作

从态度、手法及作风等三方面探究如何以求真务实创新的精神指导工会工作。     

MCMC ESTIMATION OF LÉVY JUMP MODELS USING STOCK AND OPTION PRICES

We examine the performances of several popular Lévy jump models and some of the most sophisticated affine jump‐diffusion models in capturing the joint dynamics of stock and option prices. We develop efficient Markov chain Monte Carlo methods for estimating parameters and latent volatility/jump variables of the Lévy jump models using stock and option prices. We show that models with infinite‐activity Lévy jumps in returns significantly outperform affine jump‐diffusion models with compound Poisson jumps in returns and volatility in capturing both the physical and risk‐neutral dynamics of the S&P 500 index. We also find that the variance gamma model of Madan, Carr, and Chang with stochastic volatility has the best performance among all the models we consider.     

基于ARDL模型的我国固定资产投资与经济增长关系的统计分析

文章基于动态建模思想,对我国投资与经济增长的关系进行统计分析。由1980—2006年的样本数据验证得到二者存在长期显著的双向关系,进一步建立ARDL模型,量化并分析了固定资产投资与GDP之间的长期影响系数。