A note on the projection properties of Hadamard matrices obtained by the first Payley construction

We show that the projections on four factors of an arbitrary orthogonal array of strength 2 allow the estimation of main effects and two-factor interactions when all other effects are assumed to be zero, if those projections satisfy the bounds given by Weils theorem. The only exceptions are the Hadamard matrices of orders 16 and 24. A consequence is again the estimability of main effects and two-factor interactions for the projections on four factors of the first Payley construction for arbitrary run size.     

中美上市公司年度报告披露准则比较研究

本文旨在比较分析中美上市公司年度报告披露准则，为我国修订年报准则提出建议。本文首先比较分析了中美年报准则要求披露的项目内容及其特点，在此基础上，结合我／国年报披露中存在的问题，建议在修订年报准则时借鉴美国制订年报准则的经验，并提出了几点具体改进措施。     

Workload control under continuous order release

Workload control is a production planning and control concept specifically designed for complex manufacturing environments. Past research on Workload control has been essentially focused on discrete order release. This means that release of orders to the shop floor takes places on a periodic basis. Continuous order release has been somehow neglected, in spite of its apparent potential for improving system performance, including the reduction of order flow times. This paper presents a simulation study of this order release approach. The study contributes for improving the basis for setting workload norms, selecting the workload control strategy and deciding upon routing alternatives under continuous order release.     

Spatial takeoff in the first industrial revolution

Using the framework of Desmet and Rossi-Hansberg (forthcoming), we present a model of spatial takeoff that is calibrated using spatially-disaggregated occupational data for England in c. 1710. The model predicts changes in the spatial distribution of agricultural and manufacturing employment which match data for c. 1817 and 1861. The model also matches a number of aggregate changes that characterise the first industrial revolution. Using counterfactual geographical distributions, we show that the initial concentration of productivity can matter for whether and when an industrial takeoff occurs. Subsidies to innovation in either sector can bring forward the date of takeoff while subsidies to the use of land by manufacturing firms can significantly delay a takeoff because it decreases spatial concentration of activity.     

谈“创先争优”的结果与过程

先进和优秀是中国共产党人的特征和追求,其本质是创和争,核心点是争创的过程。结果只是节点,过程才是更重要;结果体现绩效,过程更彰显价值。创先争优的过程体现了组织者的号召力和人生境界,体现着组织文化。     

国债发行规模与GDP和财政支出的关系

国债作为政府筹集资金、缓解财政压力和实施宏观经济调控与现代金融管理的重要工具,适当的国债政策是实现财政政策和货币政策调控目标、促进经济增长的重要手段与保证。我国国债的发行对支持经济的发展起到了重要的促进作用。要优化国债结构,实现国债结构进一步的合理化,就需逐步扩大地方政府债券发行规模,规范国债市场运行,调整国债投资规模与方向,促进我国经济长期稳定发展。     

投资者关注与IPO异象——来自网络搜索量的经验证据

利用谷歌趋势提供的搜索量数据,本文构建了一个投资者关注的直接衡量指标,在此基础上,运用行为金融学里投资者关注的理论,系统解释了IPO市场存在的三种异象。与文献中常见的其他解释变量相比,本文发现IPO前个股网络搜索量对于市场热销程度、首日超额收益和长期表现有更好的解释力和预测力,它可以解释首日超额收益的23%,长期累积收益率的10%以上,结果均十分显著。研究结果表明,投资者关注对资产价格有直接的影响,2009年的新股发行体制改革对首日超额收益的降低起到了明显作用。     

基于信息不对称的物流金融风险缓释探讨

风险是目前物流金融的关键问题。文章以增强物流金融的实用性为出发点,采用三维立体图分析得出了信息不对称下物流金融的九大风险。针对这些风险,文章进行了基于物联网的可视化设计,并提出了相应的风险管理方法,为信息不对称下物流金融风险的缓释提供了建议与意见。     

城市森林固碳释氧功能及经济价值评估——以第三个“国家森林城市”长沙市为实证分析

主要介绍了城市森林生态系统固碳释氧功能及经济价值评估方法,并以中国第三个"国家森林城市"长沙市为实证分析,计算了长沙市城市森林生态系统固碳和释氧功能的经济价值分别约为27.12亿元/a和10.61亿元/a,固碳释氧总价值约为37.73亿元/a,最后做了进一步分析与对比。     

转型期中国土地利用的时序优化与空间释放

随着中国经济快速发展和人口集聚,建设用地需求快速增加,土地供需矛盾日益突出,资源保护和管理的压力逐渐加大。中国经济已步入新常态,经济结构转型倒逼土地供应结构优化调整。发达国家城镇化发展阶段起步较早,在土地节约集约利用与管理方面积累了宝贵经验。结合中国城市土地利用现状,借鉴美国、英国、德国等发达国家土地利用与管理经验,可从盘活存量土地、提高土地供给精准度、建立多元化供地机制三方面实现土地节约集约利用及有效管理,促进供给侧结构性改革。