人力资本结构对我国技术效率的影响——基于随机前沿生产函数的实证分析

基于随机前沿生产函数框架,将异质性人力资本、人力资本结构纳入技术无效方程,利用1996-2008年省际面板数据估算我国区域技术效率,研究发现:我国经济增长平均技术效率水平偏低,存在区域差异,但总体区域差异有缩小的趋势,人力资本不平等对技术效率具有显著的阻碍作用,无论低技能劳动力还是高技能劳动力都对我国技术效率具有显著的正向促进作用,但进出口贸易对技术效率具有阻碍作用,市场化促进了效率的改善.     

共同资金投资组合的有效边界与最优策略

本文利用均值方差模型,分析了非线性交易成本下的共同资金投资的有效边界和在一般的效用函数下讨论了最优投资组合和最大效用,其中只考虑风险资产的总投资比例对交易成本的影响.     

Single-Period Markowitz Portfolio Selection,Performance Gauging,and Duality: A Variation on the Luenberger Shortage Function

The Markowitz portfolio theory (Ref. 1) has stimulated research into the efficiency of portfolio management. This paper studies existing nonparametric efficiency measurement approaches for single-period portfolio selection from a theoretical perspective and generalizes currently used efficiency measures into the full mean-variance space. We introduce the efficiency improvement possibility function (a variation on the shortage function), study its axiomatic properties in the context of the Markowitz efficient frontier, and establish a link to the indirect mean-variance utility function. This framework allows distinguishing between portfolio efficiency and allocative efficiency; furthermore, it permits retrieving information about the revealed risk aversion of investors. The efficiency improvement possibility function provides a more general framework for gauging the efficiency of portfolio management using nonparametric frontier envelopment methods based on quadratic optimization.     

Instructions for Authors

Chinese Physics B （Chin. Phys. B）, formerly titled Chinese Physics, is an international comprehensive academic journal, aiming to publish original papers and rapid communications reflecting creative and innovative achievements in physics, as well as review papers about important accomplishments in frontier of physics. The journal is published monthly in English by the Chinese Phvsical Society （CPS） and the IOP Publishing. Chin.     

Preface to Special Issue on Electrochemical Energy Storage and Conversion

正Energy utilization includes two aspects of storage and conversion.Both the density of energy storage and the efficiency of energy conversion are particularly considered in the application of energy.It is well known that chemical energy can be easily stored in chemical substances with high-energy density such as those containing hydrogen and lithium.Meanwhile,     

Instructions for Authors

<正>Chinese Physics B(Chin.Phys.B),formerly titled Chinese Physics,is an international comprehensive academic journal,aiming to publish original papers and rapid communications reflecting creative and innovative achievements in physics,as well as review papers about important accomplishments in frontier of physics.The journal is published monthly in English by the Chinese Physical Society(CPS)and the IOP Publishing.Chin.     

A structural approach to investigate halogen substituted MAO-B inhibitors using QSAR modeling,molecular dynamics,and conceptual DFT analysis

Halogenated inhibitors showed robust, reversible, and selective monoamine oxidase-B (MAO-B) inhibitory efficacy in candidates that were derived from them. Our team has previously synthesized and assessed a panel of halogenated chalcones and coumarin for the study on MAO-B inhibition. The aim of this study was to build GA-MLR based QSAR models and predictive 3D Pharmacophore models, as well as to investigate the relationship between halogenated derivatives and MAO-B inhibitory activity. The robust statistical significance in the parameter (R² = 0.78 and Q² = 0.69) was demonstrated. Best Hypo1 contains one hydrophobic and two aromatic rings. The lead molecule for quantum mechanics was performed, and it was revealed that it would bind to proteins and provide stability. To determine the stability of the ligand-enzyme complex, a thorough molecular dynamics analysis of the lead compounds was accomplished.