基于生态文明理念下化解城乡生态环境二元化的路径选择

改革开放30多年以来,我国城乡经济发生了翻天覆地的变化,城乡居民经济水平和生活质量都得到了普遍提升。但随着城市化、工业化进程加快,城乡经济也随之拉开差距,在城乡经济结构二元化的影响下,城乡生态环境也出现了严重的二元化趋势。介于此,本文以"天人合一、人地和谐"的生态文明理念为指导思想,在挖掘生态文明与生态环境保护两者内在关系的基础上,结合实际以分析我国城乡生态环境严重二元化的现况为出发点,剖析导致城市与乡村生态环境二元化的三大矛盾,并提出六大破解城乡生态环境二元结构可行之路,为共同构建美好生态环境提供良策。     

企业师徒关系的演进路径研究--扎根理论研究方法的应用

文章运用扎根理论的研究方法,以企业高层管理者为研究对象进行深入采访,探讨不同配对方式的师徒关系的演进路径。通过对访谈资料的搜集和编码总结出师徒关系发展的5个阶段：感知组织支持、能力认可、价值观契合、合作和信任（认知信任和情感信任）;同时,基于质性资料的分析归纳,构建了3种师徒关系配对方式（组织安排的师徒配对、师傅单向选择的师徒配对以及双向选择的师徒配对）下师徒关系的演进路径。     

上海市产业结构偏离度与经济增长关系的实证检验--基于一个新的产业结构偏离度指标

文章通过建立一个两部门的内生增长模型,根据实现平衡增长路径所需满足的条件,可得出一个相对合理的指标用来衡量产业结构以及各产业偏离度。然后应用该指标对上海市产业结构偏离度以及各产业偏离度与经济增长之间的关系进行实证检验,希望能较真实地反映上海市产业结构以及各产业的发展情况与平衡增长路径要求目标的偏离程度。最后根据各产业偏离的方向和程度,有针对性地给出上海市产业结构调整的方向以及具体的路径选择,具有一定的现实意义。     

Where Do Financial Constraints Originate from? An Empirical Analysis of Adverse Selection and Moral Hazard in Capital Markets

Despite the voluminous and growing literature on financial constraints, the origins of the constraints are hardly ever empirically analyzed. This paper offers such an analysis. We study, in particular, the empirical prevalence of adverse selection and moral hazard in capital markets using a unique survey data on Finnish small and medium-sized enterprises (SMEs). The survey data suggest that adverse selection is empirically more prevalent than moral hazard in the capital markets that the SMEs face. We also find that of the variables indicating the presence of adverse selection and moral hazard, the former has more explanatory power in regressions modeling the availability of external finance to the SMEs than the latter. Finally, we document that our proxies for adverse selection and moral hazard are inversely related to the age of firms, just like Peter Diamond’s (1989) model predicts.     

PORTFOLIO MANAGEMENT WITH CONSTRAINTS

The traditional portfolio selection problem concerns an agent whose objective is to maximize the expected utility of terminal wealth over some horizon. This basic problem can be modified by adding constraints. In this paper we investigate the portfolio selection problem for an investor who desires to outperform some benchmark index with a certain confidence level. The benchmark is chosen to reflect some particular investment objective and it can be either deterministic or stochastic. The optimal strategy for this class of problems can lead to nonconvex constraints raising issues of existence and uniqueness. We solve this optimal portfolio selection problem and investigate the procedure for both deterministic and stochastic benchmarks.     

“公司+农户”的交易效率与契约选择

运用交易费用经济学、博弈论的基本原理,以"公司+农户"这一组织形式中的契约关系为研究对象,根据抵押品模型,构建了一个"公司+农户"契约选择模型,来讨论"公司+农户"经营组织不同契约类型选择及其效率,并提出改进思路及政策含义。     

虚拟企业伙伴选择方法的研究

选择正确的合作伙伴是虚拟企业组建的关键步骤之一,也是虚拟企业成功运作的首要前提。针对某一具体案例,从目前虚拟企业伙伴选择的几种典型方法入手,运用系统研究方法,对各方法的具体思路作一总结,并提出了各方法的适用范围、优势与弊端,同时,找出了它们之间的差异所在。     

动态联盟若干问题的研究

动态联盟是 2 1世纪建立的组织模式 ,它是针对建立动态联盟的关键因素———合作伙伴的选择问题提出一种新的定量分析模型———灰色评价法。该方法在灰色系统思想的指导下建立指标体系 ,运用定权聚类法综合各指标对候选企业进行评价 ,帮助企业做出正确选择     

A proposed configurable approach for recommendation systems via data mining techniques

This study presents a configurable approach for recommendations which determines the suitable recommendation method for each field based on the characteristics of its data, the method includes determining the suitable technique for selecting a representative sample of the provided data. Then selecting the suitable feature weighting measure to provide a correct weight for each feature based on its effect on the recommendations. Finally, selecting the suitable algorithm to provide the required recommendations. The proposed configurable approach could be applied on different domains. The experiments have revealed that the approach is able to provide recommendations with only 0.89 error rate percentage.     

Far from the madding crowd: collective wisdom in prediction markets

We investigate market selection and bet pricing in a repeated prediction market model. We derive the conditions for long-run survival of more than one agent (the crowd) and quantify the information content of prevailing prices in the case of fractional Kelly traders with heterogeneous beliefs. It turns out that, apart some non-generic situations, prices do not converge, neither almost surely nor on average, to true probabilities, nor are they always nearer to the truth than the beliefs of all surviving agents. This implies that, in general, prediction market prices are not maximum likelihood estimators of the true probabilities. However, when more than one agent survives, the average price emerging from a prediction market approximates the true probability with lower information loss than any individual belief.