Two-sample rank tests with truncated populations

LetX ₁,…,X _m andY ₁,…,Y _n be two independent samples from continuous distributionsF andG respectively. Using a Hoeffding (1951) type theorem, we obtain the distributions of the vector S=(S ₍₁₎,…,S _(n)), whereS _(j)=# (X _i ’s≤Y _(j)) andY _(j) is thej-th order statistic ofY sample, under three truncation models: (a)G is a left truncation ofF orG is a right truncation ofF, (b)F is a right truncation ofH andG is a left truncation ofH, whereH is some continuous distribution function, (c)G is a two tail truncation ofF. Exploiting the relation between S and the vectorR of the ranks of the order statistics of theY-sample in the pooled sample, we can obtain exact distributions of many rank tests. We use these to compare powers of the Hajek test (Hajek 1967), the Sidak Vondracek test (1957) and the Mann-Whitney-Wilcoxon test. We derive some order relations between the values of the probagility-functions under each model. Hence find that the tests based onS ₍₁₎ andS _(n) are the UMP rank tests for the alternative (a). We also find LMP rank tests under the alternatives (b) and (c).     

复杂系统理论在大型企业物流改革中的应用

大型企业的物流系统是一个复杂系统,但现在大型企业物流管理都是由该企业承担,已不适应日益开放与复杂的市场环境,必须进行改革。文章指出改革的出路是引入第三方物流,并采用复杂系统理论,阐述了必须渐进改革过程与竞争合作、达到多赢对策,及不断学习提高竞争力的策略。     

中国上市公司的股权结构：成因与影响

股权结构对公司绩效、治理模式具有重要的影响。影响一国公司股权结构的因素是多方面的,但证券市场监管水平的差异和对中小投资者的法律保护程度差异是主要的因素。当前中国上市公司股权结构、证券监管及法律环境造成了公司治理及绩效中的诸多问题,特别是控股股东对外部投资者利益的侵害。本文对这些问题进行了研究和探讨,并提出了相应的改善措施。     

关于基本经济制度的三点探索

党的十六大重申社会主义初级阶段的基本经济制度,不仅再次肯定公有制为主体,并且把多种所有制经济包括私营经济也纳入,是对传统理论的一大突破。这是从现阶段的实际出发,有着多样的现实条件。强调两个"毫不动摇",澄清了不同看法,其结果很可能形成混合经济居大的格局:宏观上是多种所有制经济并存,微观上是产权多元化的股份制公司为典型。坚持和完善基本经济制度,有一系列的对策,除深化国有、集体企业改革和鼓励、支持、引导非公有制经济发展外,令人想起毛泽东曾经讲过的四句话:"公私兼顾、劳资两利、城乡互助、内外交流"。     

基于荣格个性类型的个性测量工具建构探索

在当前我国构建和谐社会的进程中,要求各类组织必须充分重视组织个体间的差异,有针对性地做好人力资源的配置和开发。运用实证研究方法,探索荣格个性类型在中国企业人群的因素结构,建构中国人职业个性测量工具(CVPS)。研究涉及的被试对象约2500人。结果表明:CVPS的效度和信度均较为理想,可将CVPS应用于员工心理档案创建等管理实践。     

Property rights protection and access to bank loans

Poor protection of private property has limited the access to bank loans by private enterprises in developing and transition economies. Under those circumstances, private entrepreneurs have resorted to various ways of enhancing the de facto protection of private property. Using a dataset of 3,073 private enterprises in China, this paper empirically investigates the impact of political participation and philanthropic activities – informal substitutes for the lack of formal protection of private property – on the access to bank loans.     

信息约束下的金融监管与银行声誉

如何在信息不对称的约束条件下降低金融风险、提高监管绩效,是金融监管中的一项重要课题.本文分析了信息结构对于监管的重要性,认为声誉机制的建立可以降低银行与监管部门之间信息不对称的程度和风险发生的概率,并运用KMFW模型,分析了不对称信息下银行声誉机制减少违规动机的过程,指出应该注重激励相容的制度安排,将外部监管与自律有机结合起来,促使银行自发选择接受监管且减少进行高风险投资的动机,这是信息不对称条件下提高监管效率的重要策略.结合我国实情,本文提出可通过银行风险评级、建立可置信的惩罚机制、完善银行内部治理机构、改进监管人员激励约束机制、构建和完善金融监管信息系统等措施,建立健全银行声誉机制,以进一步改善监管绩效.     

中国农村土地制度改革模式探索

农村土地制度不仅是中国革命的根本性问题,在相当长时期内,仍将是中国现代化建设的最基础问题,尤其是当前解决"三农"问题的迫切性及中国建立和谐社会目标是否已经构成了土地制度新突破的能量呢?果真如此,那么,条件是否具备?时机是否成熟?本文通过对我国农村土地制度的局限性和存在的问题分析后认为,中国农村土地制度改革已经到了必须进行所有制变革的时候了.而考虑到中国具体实际和改革面临的阻力,笔者提出了改革的战略思路是:第一阶段实行土地股份所有,市场化经营;第二阶段实行农村土地农民个人所有制.     

The Effects of Public Ownership and Regulatory Independence on Regulatory Outcomes

We examine the effects of public ownership and regulatory agency independence on regulatory outcomes in EU telecommunications. Specifically, we study regulated interconnect rates paid by entrants to incumbents. We find that public ownership of the incumbent positively affects these interconnect rates, and suggest that governments influence regulatory outcomes in favor of incumbents in which they are substantially invested. However, we also find that the presence of institutional features enhancing regulatory independence from the government mitigates this effect. In order to study regulatory independence, we introduce a new cross-country time-series database—the European Union Regulatory Institutions (EURI) Database. This database describes the development of institutions bearing on regulatory independence and quality in telecommunications in the 15 founding EU member states from 1997 to 2003 *We thank Laurent Pipitone for superb research assistance. Geoff Edwards thanks the Sasakawa Foundation and the Institute of Management, Innovation and Organization at the Haas School of Business for generous financial assistance, and London Business School for non-financial support. Leonard Waverman thanks the Global Communications Consortium for support     

关于商业银行财务管理创新的探索

本文通过深入探索商业银行财务管理理论,结合近年来我国商业银行财务管理改革的主要进展以及存在的问题,提出推进我国商业银行财务管理创新,从而提升我国银行业在国际上的竞争力。笔者认为,当前财务管理改革的思路是建立一个“以成本效益原则为基础,以信息系统为平台,以预算管理为导向,以内部控制为手段,以业绩评价为依据,通过内外部审计强化监督”的财务管理体系。