Symmetry and order in the portfolio allocation problem

Summary. This research studies the role of multivariate distribution structures on random asset returns in determining the optimal allocation vector for an expected utility maximizer. All our conclusions pertain for the set of risk averters. By carefully disturbing symmetry in the distribution of the, possibly covarying, returns, we ascertain the ordinal structure of the optimized allocation vector. Rank order of allocations is also established when a permutation symmetric random vector is mapped into the returns vector through location and scale shifts. It is shown that increased dispersion in the vectors of location and scale parameters benefit, ex-ante, investors as does a decrease in the rank correlation coefficient between the location and scale parameter vectors. Revealed preference comparative static results are identified for the location and scale vectors of asset returns. For most issues addressed, we arrive at much stronger inferences when a safe asset is available. Received: August 8, 2000; revised version: January 8, 2001     

从博弈论看商务谈判僵局的本质和处理

商务谈判中的僵局是谈判双方都不愿看到但又不得不面对的难题。只有了解了商务谈判僵局产生的本质才能够更好地处理好谈判中的僵局。从博弈论的角度,对商务谈判僵局的本质进行了分析,指出在挖掘共同利益的过程中既可以寻求到瓜分共同利益的有效途径,又可寻找到共同利益与个体利益实现的最佳结合点。     

中间选民理论在农民工市民化政策制定中的运用——基武汉市436位农民工的实证研究

The Median Voter Theory is an important theory in the neo-political economics. It can be applied to solve the collective choice paradox and analyze the policy making for the citizenization of peasant workers. Adopting the method of factor analysis, this paper makes an empirical study on peasant workers’ preference for citizenization. We find that there is a paradox of future residence preference and self-identification in peasant workers. On this basis, peasant workers are divided into 5 subgroups, and it is found that the median undecided peasant workers are the median voters. Based on the analysis of the median undecided peasant worker’s complaints and appeals, it is proposed that the country should strengthen the vocational training system, establish a social security system, expand the agricultural reform and promote educational reform to facilitate the citizenization of peasant workers. __________ Translated from Guanli Shijie 맜理世界 (Management World), 2007, (4): 40–67     

The Financial and Operational Impacts of FERC Order 636 on the Interstate Natural Gas Pipeline Industry

The Federal Energy Regulatory Commission's Order 636 fundamentally altered the regulatory and operational environment of the natural gas industry in 1992, as the culmination of several directives aimed at relaxing regulation and fostering competition. We hypothesize that gas pipeline firms subsequently changed their operational and financial behavior in ways consistent with reduced balkanization, increased competition, and reduced expense preference behavior. Our results indicate that these firms have become more homogeneous financially but less so operationally. We find evidence that the marginal profitability of various pipeline activities has responded more to financial market conditions than to the regulatory environment.     

目标公司股权结构对敌意收购的影响——中信证券收购广发证券的案例研究

兼并、收购、接管(敌意收购)和买断,是公司控制权市场常见的几种表现形式。本文通过中信证券收购广发证券的案例研究,从敌意收购的过程、动因、反收购措施及市场反应的角度对其进行了分析,并指出目标公司的股权集中度、交叉持股、非上市公司特征等股权结构方面对敌意收购的影响。     

Group decision-making: Head-count versus intensity of preference

This paper puts forth a framework for reshaping the group decision-making process. The proposed framework extends from the usual one-issue-at-a-time decision-making to one that involves several related issues simultaneously. Weaknesses of the traditional majority voting mechanism are first identified, and then a different voting method that takes each individual voter's sentiment into account is discussed. Specifically, a decision-maker is asked to express his/her intensity of preference for the issues encountered. Three hierarchical structures—benefits, costs, and risks—are developed to evaluate the alternatives. Due to the nature of pairwise comparisons and synthesis, the proposed method is amenable to consensus building and has higher reliability and consistency. It can be used for candidate selection, e.g. governmental election, when a large population is involved. It is also effective for resource allocation and prioritization when a small group or business is concerned. We believe the proposed approach has potential for resolving deficiencies of the conventional voting mechanism, and can be applied to many real-world problems. Its implementation on the Internet is also discussed.     

Blocked-Error-R 2: A Conceptually Improved Definition of the Proportion of Explained Variance in Models Containing Loops or Correlated Residuals

Bentler and Raykov (2000, Journal of Applied Psychology 85: 125–131), and Jöreskog (1999a, http://www.ssicentral.com/lisrel/column3.htm, 1999b http://www.ssicentral. com/lisrel/column5.htm) proposed procedures for calculating R ² for dependent variables involved in loops or possessing correlated errors. This article demonstrates that Bentler and Raykov’s procedure can not be routinely interpreted as a “proportion” of explained variance, while Jöreskog’s reduced-form calculation is unnecessarily restrictive. The new blocked-error-R ² (beR ²) uses a minimal hypothetical causal intervention to resolve the variance-partitioning ambiguities created by loops and correlated errors. Hayduk (1996) discussed how stabilising feedback models – models capable of counteracting external perturbations – can result in an acceptable error variance which exceeds the variance of the dependent variable to which that error is attached. For variables included within loops, whether stabilising or not, beR ² provides the same value as Hayduk’s (1996) loop-adjusted-R ². For variables not involved in loops and not displaying correlated residuals, beR ² reports the same value as the traditional regression R ². Thus, beR ² provides a conceptualisation of the proportion of explained variance that spans both recursive and nonrecursive structural equation models. A procedure for calculating beR ² in any SEM program is provided.     

中国互助游的现状及发展策略研究

网络社区的发展,旅游需求的多元化,催生了一种全新的旅游方式——互助游。根据网络调查的结果分析了互助游的概念内涵和特征,互助游客的旅游行为特征及发展互助游的障碍,在此基础上总结网络调查结果提出部分发展策略,以期引导互助旅游的健康发展。     

浅析中国传统民居所反映出的家文化偏向

对我国传统民居所反映出的家文化偏向进行了深入系统的分析,并归纳出下面几点结论:传统民居选址、布局的风水模式,反映出了一种家之环境文化偏向;传统民居的对称组群封闭式布局,反映出了一种家之伦常文化偏向;传统民居材质的“当下存在”和祠堂的“永存不灭”,反映出了一种家之“弃祈”文化偏向。     

基于亲景度的上海入境旅游客源市场分析

对上海入境旅游客源市场的准确分析，是上海国际旅游业可持续发展的前提。运用亲景度指标，定量分析了1997—2004年上海国际旅游客源市场中的统计数据，揭示了上海入境旅游市场的亲景度特征，并将客源国的亲景度和市场占有率相结合，提出上海入境旅游开发的重点市场、主要市场、新兴市场和机会市场。为增强上海国际旅游的竞争力，开发入境旅游客源市场提供理论依据。