Preferences for information on probabilities versus prizes: The role of risk-taking attitudes

Many real-world decisions entail choices between information on either probabilities or payoffs (i.e., prizes). Simplified versions of such decisions are examined to gain insight into preferences for different types of information as a function of risk-attitudes. General and simple decision rules are derived for cases where the utility function is concave (or convex) over the relevant payoff interval.The article further describes several experiments to test business students' intuitions concerning these optimal decision rules. In general, risk-taking attitudes did not correlate significantly with subjects' preferences for information, in violation of theorems regarding mean-preserving spreads of risk. Other tests, e.g., narrowing certain probability ranges, also resulted in preferences contrary to expected utility (EU) theory.     

土地利用结构研究综述

合理利用土地、调整土地利用结构、实现土地资源的优化配置是各个国家和地区都亟待解决的问题,为此,通过总结国内外学者从最初的土地利用调查和简单的定性研究变为目前借助信息技术,构建数学和物理模型,广泛地对土地资源、生态环境、经济学等多交叉学科的综合性研究成果的基础上,针对土地利用结构未来的研究方向提出自己的观点,以期为我国土地利用结构的研究和管理提供理论依据.     

Why and when female directors are less engaged in their board duties: An interface perspective

Female representation on boards is perhaps one of the most studied topics in board-governance research. At the same time, much is unknown about female directors' task engagement within boards. Drawing from psychological theory on societal gender beliefs, our study tests whether the impact of director gender on supervisory task engagement hinges on status dynamics in two relational interfaces: the director–board interface and the director–CEO interface. According to this perspective, female directors show less task engagement because gender is a diffuse status cue that creates status differentiation within the director–board interface. Multi-source board survey data (n = 61 boards, n = 315 directors) confirms that, within the confines of the boardroom, female directors do, indeed, receive lower-status ratings than male directors. This effect is weaker when boards have a female chair. Furthermore, lower status explains perceived lower task engagement of female directors, but this link critically hinges on the CEO–director interface. The impact of status differences is more pronounced when directors intersect with a relatively dominant CEO. All in all, the results demonstrate that relational interfaces play a key role for female directors’ task engagement in their board duties.     

Analysis of Order Statistics from Distributions with Regularly Varying Tails

In this article, necessary conditions for comparing order statistics from distributions with regularly varying tails are discussed in terms of various stochastic orders. A necessary and sufficient condition for stochastically comparing tail behaviors of order statistics is derived. The main results generalize and recover some results in Kleiber (2002 Kleiber, C. (2002). Variability ordering of heavy-tailed distributions with applications to order statistics. Statist. Probab. Lett. 58:381388.[Crossref], [Web of Science ®] , [Google Scholar], 2004 Kleiber, C. (2004). Lorenz ordering of order statistics from log-logistic and related distributions. J. Statist. Plann. Infer. 120:2004.[Crossref], [Web of Science ®] , [Google Scholar]). Extensions to coherent systems are mentioned as well.     

基于概率权重函数和随机占优准则的开放式基金评级

传统的开放式基金评级方法存在两个缺陷,首先是忽视了现实中投资者是如何做决策的,假定投资者对利益和损失的主观态度相同;其次是忽略了现实的样本性质,假定随机收益的样本达到渐近正态的规模。通过期望效用的高阶泰勒序列展开建立超额收益的高阶矩和效用函数的关系,以高阶矩为约束条件估计样本的经验概率,再对经验概率进行决策权重调整。在此基础上,通过扩展夏普比和应用随机占优准则进行基金评级,并对645种开放式基金进行了案例分析。     

Stochastic Spanning

ABSTRACT

This study develops and implements methods for determining whether introducing new securities or relaxing investment constraints improves the investment opportunity set for all risk averse investors. We develop a test procedure for “stochastic spanning” for two nested portfolio sets based on subsampling and linear programming. The test is statistically consistent and asymptotically exact for a class of weakly dependent processes. A Monte Carlo simulation experiment shows good statistical size and power properties in finite samples of realistic dimensions. In an application to standard datasets of historical stock market returns, we accept market portfolio efficiency but reject two-fund separation, which suggests an important role for higher-order moment risk in portfolio theory and asset pricing. Supplementary materials for this article are available online.     

Asymptotic Behaviors of the Lorenz Curve for Censored Data Under Strong Mixing

In this article, we consider a nonparametric estimator of the Lorenz curve under censored dependent model. We show that this estimator is uniformly strongly consistent for the associated Lorenz curve. Also, a strong Gaussian approximation for the associated Lorenz process are established under appropriate assumptions. A law of the iterated logarithm for the Lorenz process is also derived.     

Data-Driven Tests for Trend

This article proposes a new nonparametric test for the ordered alternatives problem in the k-sample setting for null hypothesis of lack of trend. This article further elaborates upon and extends the results of Ledwina and Wy?upek (2012a Ledwina , T. , Wy?upek , G. ( 2012a ). Two-sample test against one-sided alternatives . Scand. J. Statist. 39 : 358 – 381 .[Crossref], [Web of Science ®] , [Google Scholar]) obtained for k = 2. Simulations show that the new test has high and stable power and is able to control the Type I error to satisfactory extent, thus solving the problem posed in Terpstra and Magel (2003 Terpstra , J. T. , Magel , R. C. ( 2003 ). A new nonparametric test for the ordered alternative problem . J. Nonparametr. Statist. 15 : 289 – 301 .[Taylor & Francis Online], [Web of Science ®] , [Google Scholar]). Our theoretical results say that asymptotic errors of both kinds do not exceed significance level, thus implying that the test is asymptotically unbiased.     

广义虚拟经济论要

基于马克思“生活对象化”人类活动图式的广义虚拟经济,是同时满足人的生理需求和心理需求并以心理需求为主导,以及只满足人的心理需求的经济的统称。虚拟价值（信息态）是它得以产生的源泉。它不断发展的机理是二元价值容介态。在广义虚拟经济时代,一些传统的经济学规则正在受到挑战,虚拟价值进入交换领域和生活本身就构成了全新的财富观,财富标志被赋予了更深刻的经济学内涵。因此,我们必须立足于生活是财富之父,加快转变经济发展方式,推动商业模式创新,树立时空寻租思维,重视人力资本的作用,大力发展各种富含虚拟价值要素的产业并对其实行优化、均衡管理,掌握以制文化权为核心的广义虚拟经济主导权。广义虚拟经济的发展具有积极的社会意义。
关键词： 虚拟价值;广义虚拟经济;二元价值容介态;广义虚拟经济主导权