On the Use of Value Efficiency Analysis and Some Further Developments

The purpose of this paper is to discuss the use of Value Efficiency Analysis (VEA) in efficiency evaluation when preference information is taken into account. Value efficiency analysis is an approach, which applies the ideas developed for Multiple Objective Linear Programming (MOLP) to Data Envelopment Analysis (DEA). Preference information is given through the desirable structure of input- and output-values. The same values can be used for all units under evaluation or the values can be specific for each unit. A decision-maker can specify the input- and output-values subjectively without any support or (s)he can use a multiple criteria support system to assist him/her to find those values on the efficient frontier. The underlying assumption is that the most preferred values maximize the decision-maker's implicitly known value function in a production possibility set or a subset. The purpose of value efficiency analysis is to estimate a need to increase outputs and/or decrease inputs for reaching the indifference contour of the value function at the optimum. In this paper, we briefly review the main ideas in value efficiency analysis and discuss practical aspects related to the use of value efficiency analysis. We also consider some extensions.     

Are generalized call-spreads efficient?

In order to explain coexistence of a deductible for low values of the loss and an upper limit for high values of the loss in insurance contracts, we consider the exchange of risk between two rank dependent expected utility maximizers. It is shown that if the insurer (insured) takes more into account the lowest outcomes – hence maximal losses – than the insured (insurer), then the optimal contract has an upper limit (includes a deductible for high values of the loss). If furthermore, the insured (insurer) neglects the highest outcomes while the insurer (insured) does not, the optimal contract includes a deductible (full insurance) for low values of the loss.     

基于层次分析法的建设项目质量等级评定

从引入建设项目质量概念开始,构造了一个实用的、有良好操作性的三级递阶层次结构进行建设项目质量的定量评判,并且引入改进了的权重计算方法。     

DEA evaluations of long- and short-run efficiencies of digital vs. physical product “dot com” companies

This paper applies Data Envelopment Analysis to determine relative efficiencies between internet dot com companies that produce only physical products and those that produce only digital products. To allow for the fact that the latter are relatively inexperienced, a distinction is made between long- and short-run efficiencies and inefficiencies, with a finding of no statistically significant difference in the short run but digital product companies are significantly more efficient in the long run. A new way of distinguishing between long- and short-run performances is utilized that avoids the need for identifying the time periods associated with long-run vs. short-run efficiencies and inefficiencies. In place of “time,” this paper utilizes differences in the “properties” that economic theory associates with long- and short-run performances.     

建筑外墙氟碳涂料施工的质量监控

建筑外墙氟碳涂料克服了以往氟碳涂料不能常温固化的缺点，能应用于混凝土等无机材质的表面。由于其具有超耐候性等卓越性能，已受到业主、设计的关注和市场的认可，在外墙饰面中将得到广泛应用。文章浅析了外墙氟碳涂料的材料特性，阐述了外墙氟碳涂料施工阶段的质量事前控制、事中控制和事后控制；对某工程外墙氟碳涂料施工质量缺陷产生的原因进行了分析，提出了相应的预控措施。     

谈绿色施工

绿色施工是可持续发展战略的具体体现，总结了当前绿色施工中存在的问题及解决问题的方法，在此基础上展望绿色施工的前景。     

工程施工机械设备租买决策模型与准则

施工企业可以通过租赁或购买获取工程施工设备，采取何种方式应综合考虑各方案的经济合理性，风险大小，便捷和省时等，重点论述了工程施工机械设备租买决策的数学模型和相关决策准则，可供工程承包公司进行施工设备租买决策时参考。     

The productivity of private and social farms: Multilateral Malmquist indices for Slovene dairying enterprises

Applying programming techniques to farm-level panel data for four cooperative and 12 private dairy farms in the Yugoslav Republic of Slovenia gives estimates of technical efficiency, scale efficiency, and technical progress. These are used to construct multilateral Malmquist indices of total factor productivity (TFP). For the cooperatives, TFP growth has been slow and is attributable to technical progress. For the private farms, technical progress was also slow, but TFP growth was faster due to improved efficiency. Scale inefficiency explains the poorer absolute performance of the private farms, indicating the need for land reform as well as technological change.     

中美证券公司资本配置差异分析

中国证券行业发展速度很快,但是效益普遍不好,亏损面很大,除外部环境制约外,内部资本运营水平不高仍是关键因素.本文选择有代表性的美国若干证券公司,解析其资产负债结构、收入结构等资本配置和运营形式,从而为我国证券公司找到差距和提供可借鉴之处,以改善中国证券行业经营状况,增强其抵抗与日俱增的各种风险之能力.     

我国城市化危及土地资源持续利用的立法原因探析

随着我国城市化进程的不断加快 ,土地资源供给的有限性与人们对土地资源需求的无限性之间的矛盾日益突显。而在此背景下重新修订公布的《土地管理法》在涉及建设用地需求的无限扩展与农业用地数量的持续下降这两个突出问题上 ,并没有明确政府的职能定位 ,也反映出了相关制度的模糊性。本文就此进行了探讨。