Efficient Multi-Attribute Negotiation with Incomplete Information

Multi-attribute negotiation is an important mechanism for distributed decision makers to reach agreements in real-world situations. It allows the possibility of reaching “win-win” solutions for both parties, who trade off different attributes in a solution. Existing research on multi-attribute negotiations has mainly focused on the situations when negotiation parties have complete information about each other's preference. This paper presents a model with incomplete information, while considering Pareto-efficiency and computational efficiency. A non-biased mediator, who applies query learning to maintain near Pareto-efficiency without heavy computation, is adopted in the model. In addition, the mediating mechanism proposed in the model overcomes the difficulty of preference elicitation which usually arises in the preliminary step of a multi-attribute negotiation. Our model also reduces the negotiation complexity by decomposing the original n-dimensional negotiation space into a sequence of negotiation base lines. Agents can negotiate upon a base line with rather simple strategies. The experimental results show that near Pareto-efficient agreements can be reached effectively.     

物流行业盛会好戏连台

亚洲运输物流行业盛会——transport logistic China暨中国国际物流、交通运输及远程信息处理博览会将于2006年9月19日至22日在上海举办。届时，行业内的领军人物将会聚中国最现代化的展馆——上海新国际博览中心。与此同时，国际货运代理协会联合会世界大会（FIATA）也将在上海举行。     

The incremental value of a futures hedge using realized volatility

A number of prior studies have developed a variety of multivariate volatility models to describe the joint distribution of spot and futures, and have applied the results to form the optimal futures hedge. In this study, the authors propose a new class of multivariate volatility models encompassing realized volatility (RV) estimates to estimate the risk‐minimizing hedge ratio, and compare the hedging performance of the proposed models with those generated by return‐based models. In an out‐of‐sample context with a daily rebalancing approach, based on an extensive set of statistical and economic performance measures, the empirical results show that improvement can be substantial when switching from daily to intraday. This essentially comes from the advantage that the intraday‐based RV potentially can provide more accurate daily covariance matrix estimates than RV utilizing daily prices. Finally, this study also analyzes the effect of hedge horizon on hedge ratio and hedging effectiveness for both the in‐sample and the out‐of‐sample data. © 2009 Wiley Periodicals, Inc. Jrl Fut Mark 30:874–896, 2010     

城乡一体化进程中乡村土地利用效益评价

文章在实地(河北省邢台市)调研基础上,通过文献分析与成本分析相结合的方法对城乡一体化进程当中乡村土地利用效益进行系统的评价,并在此基础上揭示出目前我国在城乡一体化进程当中乡村土地利用过程当中存在的问题,并给予相应的建议。研究结果表明:我国城乡一体化进程当中,对我国乡村土地利用效益影响较大的主要因素有政府政策不合理、对于土地利用效益缺乏足够认识,这些原因直接导致在城乡一体化进程当中乡村土地耕地边际化现象严重、城市建设用地规模过大、土地生态效益低下及乡村土地配置不合理等现象的出现。基于对土地效益评价与我国目前乡村土地利用状况的深入分析,该文认为应从土地的经济效益、社会效益及生态效益对于目前城乡一体化进程当中存在的土地利用效益偏低的现象进行整改,例如提高土地的集约度,实行大规模的机械化生产进而提高土地的经济效益;通过合理规划商业用地、居民住房用地及农业用地的比例提高土地的社会效益;发展多种形式的生态养殖与特色旅游业促进土地生态效益的提高。     

城乡医疗救助制度的现状、主要问题与建设重点

城乡医疗救助制度通过对困难家庭成员的直接救助与资助参加社会医疗保险, 对缓解困难家庭医疗支出负担起到了积极作用。 城乡医疗救助制度目前主要存在的直接救助水平过低、 财政投入非制度化以及审批手续繁琐、 病种限制过严等问题, 可以从提高直接救助水平、 扩大救助病种目录、 借鉴相关社保制度、 开展多样化救助, 以及加强基层医疗卫生建设、 对城乡困难家庭成员开展健康教育与继续提高医疗保险的保障水平等方面重点加强建设, 另外也应重视城乡医疗救助的信息化建设。     

Environmental Governance of Enterprises and their Economic Upshot through Corporate Reputation and Customer Satisfaction

Drawing on resource‐advantage and signalling theories, we investigate two mechanisms, namely corporate reputation and customer satisfaction, by which the environmental governance of enterprises can benefit their economic performance. Based on secondary data from the 500 largest US enterprises compiled from multiple sources, our findings contribute to the literature by establishing the link between corporate reputation and green reputation. We also establish the economic performance paths of environmental governance via corporate reputation and customer satisfaction. This study expounds on why ‘green’ matters and identifies the performance roles of two corporate strategic resources extractable from the environmental governance of enterprises. Copyright © 2012 John Wiley & Sons, Ltd and ERP Environment     

改善优化营商环境的举措、成效与展望——基于世界银行《营商环境报告2020》的分析

市场经济条件下,处理好政府与市场关系、实现政府职能转变,是推进政府治理现代化需要解决的重要问题。近年来,我国十分注重通过优化营商环境推进政府职能转变,优化营商环境建设取得了一些积极成效,营商环境指数国际排名大幅提升,建设项目许可、保护少数投资者等指标大幅改善。依据世界银行《营商环境报告2020》的评价结果,下一步,应强化税务便利化,优化信贷环境,健全破产制度;促进营商环境向法治化、便利化、公平化方向发展,打造国际一流营商环境。     

Short Sales and Price Discovery in the Hong Kong Real Estate Market

Indirect real estate (IRE) returns are often shown to lead direct real estate (DRE) returns. Apart from differences in liquidity, transaction costs, and management skills, the DRE market is also less complete than the IRE market—when negative shocks arrive, one can only short IRE (e.g., real estate stocks or REITs), but not DRE. This study investigates if short sales in the IRE market convey any information to the DRE market. Based on high‐frequency (weekly) property price data in Hong Kong from 2000 to 2012, we find that short sales in the IRE market led DRE returns, even after controlling for the lagged IRE returns in a VAR model. This supports an information spillover mechanism in which the DRE market learns private information that is not reflected in IRE returns. The spillover effect, however, weakened after the recent global financial crisis because the increased uncertainty over the credibility of individual firms made short sales more reflective of firm‐specific information than real estate market fundamentals.     

天然气压缩因子对流量计量的影响

探讨了速度式和容积式流量计用于天然气计量时,天然气压缩因子对其计量结果的影响;同时也探讨了无压缩因子修正或修正不当而造成的二次仪表计量误差.