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.     

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。     

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。     

检讨我国撤销权制度

撤销权制度是债权人保全自己债权的重要制度,但我国撤销权制度存在着法律规定不够细致,司法实践经验积累不够丰富,理论探讨不够深入等问题,影响了我国撤销权制度的进一步完善和在现实生活中发挥作用。故做此文,抛砖引玉,以期引起讨论之风。     

Product resource–capability complementarity,integration mechanisms,and first product advantage

The current study extends work on resource-based theory (RBT) by exploring resource—capability complementarity in a new context—that of new technology ventures' (NTVs) first product (FP) commercialization in India. This study examines the influence of marketing and technology resource–capability complementarity on FP positional advantages (differentiation and cost-efficiency) and their influence on first product performance (FPP). Furthermore, this study incorporates the influence of supplier integration (SI) mechanisms (in terms of knowledge sharing and co-commercialization) in the process of FP commercialization. The findings suggest that asset complementarities have a positive relation with FP positional advantages, in that both differentiation and cost-efficiency enhance an NTV's FPP, and that SI moderates the relationships between both marketing and technology R–C complementarity and FP positional advantages.     

传统文化与中国现代管理理论

作为一种组织行为,管理的思想与方式深刻反映其所依赖的社会与文化背景。文化有其不可阻断的继承性和延续性,其中的管理思想乃是本国传统文化的继承、发展与创新。管理理论越是能够充分体现社会的传统与文化,则管理的意义就越大。中国现代管理理论就是对中国传统文化中管理思想的梳理和升华,中国传统文化是中国现代管理理论的支撑和基石。     

The business case of a network that serves both public safety and commercial subscribers

Deploying a single nationwide broadband wireless network to serve all public safety users would have great advantages over the existing fragmented public safety systems. A nationwide system could be created to serve both public safety and commercial subscribers, which would allow a provider to exploit important economies but force it to meet the more costly requirements of public safety. This paper analyzes the viability of a public-private partnership that serves public safety and commercial subscribers from a for-profit provider's perspective. A model is presented that estimates the net present value (NPV) of a wireless network by calculating costs based on the number of cell sites required and revenue based on the projected number of subscribers acquired. The model is applied to both a network that serves only commercial subscribers on 10 MHz of 700 MHz spectrum and a public-private partnership that serves commercial subscribers and public safety personnel on 20 MHz of 700 MHz spectrum. It is found that NPV is greater for the public-private partnership than for the commercial-only network for any population density, which shows that the value of 10 MHz of spectrum exceeds the cost of meeting public safety requirements. Furthermore, the paper demonstrates that NPV/cell increases with population density, so urban areas are profitable and rural areas are unprofitable. The paper demonstrates that a partnership covering 94% of the US population breaks even because the most urban 56% of population subsidizes coverage for the next 38%. If initial deployment is subsidized, a financially sustainable public-private partnership can serve much more than 94%. Additionally, it is shown that allowing urban municipalities to opt-out of the partnership can significantly increase the subsidies required.     

论“首位城市”建设——兼论强化南宁市功能作用

文章通过对广西以及南宁市发展状况的分析,指出,把南宁市建设成为综合实力雄厚的广西“首位城市”,以此带动广西北部湾经济区乃至全广西经济社会又好又快发展,对于缩短与先进省市的差距,建设富裕文明和谐新广西,十分重要,也十分必要。文章提出,要把南宁建设成广西首位城市,应做大做强南宁市的产业和企业,不断增强产业的聚集力;强化服务功能,不断增强产业的聚集力;夯实教育基础,大规模培育和输送人才、智力;着力于创业创新,建设好科技企业的孵化基地;本着以人为本,全面发展,极大地增强城市综合实力。     

2009年上半年新疆农户固定资产投资调查分析

本文对新疆30个县（市）1550户农民固定资产投资情况进行了调查分析,认为2009年以来,随着中央和自治区继续加大对新疆农村的各项投入和惠农富农政策的逐步落实到位,农民收入持续增长,农户投资热情高涨,农民生产性和生活性的固定资产均保持了较快增长,农业和农村经济呈现良好发展态势。