论新经济时代的人力资本产权

一、人力资本要求产权具有客现性西奥多·舒尔茨最早创立了现代经济学人力资本理论,他是从探索经济增长和社会富裕的秘密而逐步踏上人力资本研究之路的。舒尔茨认为,单纯从自然资源、实物资本和劳动力的角度,不能解释世界各国生产力提高的全部原因,除了那些已知的经济增长要素外,一定还有重要的生产要素被“遗漏”掉了,这个要素就是人力资本。所谓人力资本,即为人们花费在教育、培训、保健等方面的开支所形成的资本,这种资本凝结和贮存在特定的人身上,体现为人的智力、知识和技能等。当代西方经济学认为:资本采取两种形式,即物力资本和人力…     

数字经济发展促进我国产业结构升级的机理与路径

通过数字经济发展来推动产业结构升级已经成为我国经济发展的重要战略。数字经济发展可以为产业结构升级提供技术创新、产品创新、商业应用模式创新、产业融合创新及需求侧结构创新等支持。然而,当前我国区域经济发展不平衡、数字技术的依赖效应、数字经济的垄断性、企业创新动力不足、复合型数字技术人才供给不足及数字化公共服务体系缺失等因素降低了数字经济推动产业结构升级的作用。基于此,我国应从完善数字经济治理体系,加强平台反垄断,加大需求侧改革,加强数字技术人才培养,加快数字经济与三次产业融合等方面提升数字经济对产业结构升级的促进作用。     

颐中集团人才战略与理论创新

青岛颐中集团历史悠久,近些年来取得了更加突出的业绩。颐中集团独特的人才战略的实施是其成功的主要原因之一。颐中集团独特的人才战略主要表现为:人力资源管理基本战略的制定;采用移动商学院和网络培训等新模式对员工进行培训;"首席技术工人、技师聘任制"取得初步成效;实施"人才管理工程"。     

中国农村新型合作医疗制度的研究

文章全面回顾建国后农村合作医疗兴衰的历程,探讨了农村新型合作医疗制度存在的问题,研究政府和医疗卫生机构作为制度供给主体和服务主体缺位的原因,并提出了完善农村新型合作医疗制度的对策建议,确实保障我国农村居民的社会医疗保障权利。     

内衣用纤维新宠--MODAL(莫代尔)

在纺织技术高速发展的今天,新的纺织纤维不断涌现,MODAL纤维就是其中的一种。由于它的天然、环保性能以及卓越的服用性能得到了大家的好评,在众多新颖的纺织纤维中脱颖而出,尤其得到内衣生产厂家的青睐,展现着它的魅力。     

Can negative interest rates really affect option pricing? Empirical evidence from an explicitly solvable stochastic volatility model

The profound financial crisis generated by the collapse of Lehman Brothers and the European sovereign debt crisis in 2011 have caused negative values of government bond yields both in the USA and in the EURO area. This paper investigates whether the use of models which allow for negative interest rates can improve option pricing and implied volatility forecasting. This is done with special attention to foreign exchange and index options. To this end, we carried out an empirical analysis on the prices of call and put options on the US S&P 500 index and Eurodollar futures using a generalization of the Heston model in the stochastic interest rate framework. Specifically, the dynamics of the option’s underlying asset is described by two factors: a stochastic variance and a stochastic interest rate. The volatility is not allowed to be negative, but the interest rate is. Explicit formulas for the transition probability density function and moments are derived. These formulas are used to estimate the model parameters efficiently. Three empirical analyses are illustrated. The first two show that the use of models which allow for negative interest rates can efficiently reproduce implied volatility and forecast option prices (i.e. S&P index and foreign exchange options). The last studies how the US three-month government bond yield affects the US S&P 500 index.     

Aggregation of the generalized fractional processes

The paper studies the interaction between aggregation and persistence pertaining to skip sampling of stock variables as well as temporal aggregation of flow variables for the generalized fractional processes. We show that, for skip sampling, the long memory feature at the zero frequency can arise from the aggregation of a generalized fractional series, while temporal aggregation does not induce such phenomenon. Simulation results are included to demonstrate the practical relevance of the theoretical results.     

宁静灵致 回归自然——读丁融油画作品有感

正30年前即享有"少年天才"的美誉,成为当时中国画坛的一段佳话。后来因画坛名家或激赏、或苛责,无形的压力使他产生了逆反情绪,遂放弃画笔多年。今天所展示的新近作品,不难看出他回归画坛后的种种思考。现实社会的千变万化与对过往年代的追忆,小人物、大都市的生活状态,都充分体现在其作品中。从他严肃的视觉架构中,我们可以看到他对都市生存状况的担忧,以及对宁静的自然生活的渴望。     

Optimal interest rate rule in a DSGE model with housing market spillovers

This paper studies the optimal interest rate rule in a DSGE model with housing market spillovers (Iacoviello and Neri, 2010). We find that the optimal rule responds to house price inflation even when the stabilization of house price is not among the objectives of the policymaker, and that the strength of the response depends crucially on a few structural parameters.     

The Impact of Farmland Transfers on Agricultural Investment in China: A Perspective of Transaction Cost Economics

There is growing concern that farmland transfers lead to less agricultural investment, which may adversely affect agricultural productivity growth in China. Prior research has primarily focused on the differences between owned cultivated land and rented plots, but little is known about how farmland transfers between relatives, which are popular in rural China, specifically affect agricultural investment. In this paper, we present a conceptual framework of transaction cost economics to compare different contracting strategies in China's farmland rental markets. As farmland rental markets in China are immature, land transfer between relatives establishes bilateral governance, which has the advantage of addressing the opportunistic activities of both parties and can ultimately increase investment by tenants. Based on data from two waves of household surveys, we empirically examine the impact of bilateral governance on the application of organic fertilizer, an indicator for agricultural investment. Our findings show that apart from economic factors, kinship is important to the functioning of farmland rental markets in rural areas.