论维持黄河健康生命的关键技术与调控措施

随着流域来水来沙过程的大幅变化及人类活动的日趋剧烈,黄河发生了很大的变化,主要表现为：流域生态环境退化,水土流失严重,悬河加剧,功能性断流与水患并存,水质污染日益加剧。本文系统地分析了导致黄河健康恶化的因素,提出基于全流域综合调控的“临界控制论”,可作为维持黄河健康生命的理论基础,它包括黄河流域不同层次的临界指标体系和流域水沙资源优化配置的数学模型。构建黄河流域水沙调控体系是维持黄河健康生命的技术支撑,其主要功能是增水、减沙、调节水沙过程,按黄河现有的条件,下游河道塑造和维持中水河槽的平滩流量约为4000m^3／s左右。     

关于承保周期理论的文献研究

西方发达国家保险市场经长期发展已较为成熟,并表现出周期性波动的现象,这也受到了保险业内人士和学者的关注。其中波动变化最显著的为承保业务及收益的规律变化。文章综述了国际上研究承保周期的学说文献,探讨各种理论的观点及特色,全面梳理承保周期的研究情况。     

数字动漫企业核心竞争力与专利布局的关联性分析

数字动漫产业作为21世纪最具成长潜力的文化创意产业,在世界经济结构转型中创造着巨大的经济价值。在全球化的竞争时代下,要创造领先优势,取得专利权的保护并进行战略性专利布局是一种重要的手段。而对于技术密集的数字动漫产业而言,企业的专利拥有量及布局管理更是其核心竞争力的体现。     

马克思主义经济学与西方经济学关于公共物品的思想体系比较

逐步实现基本公共服务均等化已经成为我国新时期落实科学发展观的重要任务和战略主题。西方经济学学者研究公共物品理论以唯心主义"理性人"为假设前提,马克思主义经济学则以唯物主义的"社会人"假定展开分析。对公共物品的这两种思想体系进行比较分析,有助于把握公共物品思想的发展脉络和社会主义市场经济条件下公共物品的内涵、特征和本质,明确其范围和供给方式,进一步转变政府职能,促进我国基本公共服务均等化,构建社会主义和谐社会,实现社会公平。     

The impact of perceived security and consumer innovativeness on e-loyalty in online travel shopping

ABSTRACT

This study investigates the impacts of perceived security and consumer innovativeness on online travel shopping. A survey questionnaire was used to collect data and a total of 283 questionnaires were used for data analysis. The mechanism of perceived security and consumer innovativeness was then identified. The study results indicate that: (1) higher perceived security increases the perception of website image and trust; (2) consumers with a higher level of innovativeness tend to trust travel websites; (3) website image has a mediating effect between perceived security and trust; and (4) trust has a mediating effect between website image and e-loyalty.     

国际制度对国内政治的影响机制——来自理性选择制度主义的解释

近些年来,理性选择制度主义者为国际制度的国内影响发展了几种重要的因果机制。理性选择制度主义主要探讨了在行为体偏好给定的条件下,国际制度如何改变了国内行为体在信息、权力和利益分布上的既有均衡状态,从而影响了国内政治的结果。如果国内制度具有集权的特点,国际制度就可以作为信号和承诺装置;如果国内制度具有分权的特点,国际制度就可以用来对权力资源进行再分配。但这两种效应往往发生在国际制度对国家行为的约束力较强时。当国际制度对国家行为的约束力较弱时,国际制度可以作为社会集团的政治动员工具。     

A conceptual framework for public-private interplay in the telecommunications sector

Public activity in the telecommunications industry has experienced important transformations in the last decade: “reinvolvement” in infrastructure deployment, “innovative” boosting measures, and decentralisation of some decisions. Conceptually, even more important than the measures themselves is the fact that private agents often participate in their realisation and execution. This paper reviews how justifications for public action that would apply to any economic activity area have modelled the public-private relationship in the telecommunications sector. Subsequently, it focuses on the analysis of the new spaces for public-private collaboration that are currently opening up.     

产权制度变革与污染权的优化配置

产权的作用机制在于产权制度使财产所有者有动力关心财产的使用和增值,使所有者的努力程度与财产收益正相关。对于不断发生“公共物悲剧”现象,应科学界定环境污染的初始产权,完善环境污染权的交易制度,以实现资源的优化配置。     

流域水沙资源优化配置理论与模型及其在黄河下游的应用

本文在分析流域水沙资源利用现状、水沙灾害性及水沙优化配置必要性的基础上，构建了流域水沙资源联合多目标优化配置理论框架，它由河床演变均衡稳定理论和水沙资源联合多目标优化配置理论组成，进而建立了流域水沙资源优化配置数学模型，该模型包括河床演变均衡稳定模型和水沙资源多目标优化配置模型两个子模型。应用模型计算分析了黄河下游主河槽的均衡稳定断面尺寸和输水输沙优化的临界指标，提出了强化非恒定流调水调沙、调控含沙量60～100kg/m3之间的不利水沙条件等改善小浪底水库调度运用的措施，并进一步提出了黄河下游水沙资源多目标优化配置的模式, 应用模型计算分析了不同水沙条件的水沙资源优化配置方案,为黄河下游河道的科学治理提供了新的思路。     

On the Rationality of the Post-Announcement Drift

This paper demonstrates that a post-announcement earnings drift, which is often advanced as an example of market irrationality, can arise even if traders act rationally on their information. Specifically, we show that in the presence of share supply variations which are unrelated to information, there is a positive correlation between the unexpected component of current public signals and future price changes. Such a correlation arises from the fact that while prices reveal private information that cannot be found in public signals, non-information based trading distorts the information content of prices relative to the implications of both private and public information. Under these circumstances, markets may appear semi-strong inefficient and slow to respond to earnings announcements even though information is processed in a timely and efficient manner. Our findings correspond well with previously documented empirical evidence and suggest that the robustness of earnings-based anomalies may be rational outcomes of varying uncertain share supply.