Large deviation asymptotics for statistical treatment rules

This note applies large deviation-based optimality theory to evaluate treatment rules for treatment assignment problems. We find nearly optimal treatment rules whose asymptotic maximum large deviation risks can be arbitrary close to the corresponding minimax bounds.     

用正交试验法优选刀具切削角度

本文结合实例阐述了用正交试验法优造刀具切削角度的步骤和具体方法。     

Ownership concentration and corporate governance practices: substitution or expropriation effects?

The objective of this study is to analyze the relation between ownership concentration and corporate governance practices of a group of Canadian companies listed on the Toronto Stock Exchange. We rely on the corporate governance index developed by the Report on Business (ROB) in 2002. Our empirical results are consistent with the expropriation effect argument that predicts a negative relation between deviation from the one share‐one vote rule and corporate governance best practices. In this context, the dominant shareholder has incentives to maintain weak internal controls in order to facilitate expropriation. In addition, consistent with prior research, our results give partial support to the substitution effect argument by showing a negative impact of ownership concentration on the board composition subindex. Copyright © 2007 ASAC. Published by John Wiley & Sons, Ltd.     

规模经济理论与我国的大企业战略

大企业战略是企业所选择的一种总体战略,在本质上,它属于发展战略的一种。企业采取这种战略往往表现为,规模的迅速扩张,资源的广泛占有,购并行动的加速,高市场占有率的执着追求等。本文从规模经济的角度分析我国的大企业战略。     

大倾角超长综放工作面放顶煤工艺浅析

结合放顶煤工艺在公乌素煤业大倾角超长工作面的应用现状,分析了放顶煤工艺参数的选择、方案的确定、工序的安排及取得的高产高效成果等,提出了放顶煤工艺在公乌素煤业16#煤层中应用时为进一步提高煤炭资源回收率而需改进的工作。     

“Swimming Ducks Forecast the Coming of Spring”—The predictability of aggregate insider trading on future market returns in the Chinese market

This study systematically examines the ability of aggregate insider trading to predict future market returns in the Chinese A-share market. After controlling for the contrarian investment strategy, aggregate executive(large shareholder)trading conducted over the past six months can predict 66%(72.7%) of market returns twelve months in advance. Aggregate insider trading predicts future market returns very accurately and is stronger for insiders who have a greater information advantage(e.g., executives and controlling shareholders).Corporate governance also affects the predictability of insider trading. The predictability of executive trading is weakest in central state-owned companies,probably because the "quasi-official" status of the executives in those companies effectively curbs their incentives to benefit from insider trading.The predictive power of large shareholder trading in private-owned companies is higher than that in state-owned companies, probably due to their stronger profit motivation and higher involvement in business operations. This study complements the literature by examining an emerging market and investigating how the institutional context and corporate governance affect insider trading.     

上海外来人员就业形势及应对措施

运用产业结构偏离度和就业弹性指数两个指标,对上海市外来从业人员的就业现状及问题进行了分析,并提出了产业结构转型下完善上海市外来从业人员的就业对策：1）在宏观上充分发挥经济调控作用;2）在微观上实行差别化就业政策;3）搭建高效的就业信息发布平台。在产业结构转型下,为政府逐步实现外来从业人员充分就业的目标提供借鉴。     

THE REVOLUTION WITHIN: ICT AND THE SHIFTING KNOWLEDGE BASE OF THE WORLD'S LARGEST COMPANIES

This empirical article analyses the importance of information and communications technologies (ICT) in the technological diversification trend among the world's largest manufacturing firms during the 1980s and 1990s. The objective of the research is twofold: first, to emphasise the emerging differences among technologies when companies from different industries patent outside their traditional technological capabilities; secondly, to investigate whether the tendency among large companies from all industries to patent in ICT is distinctive when compared with the tendency to patent in other technologies. We find that technological diversification in large companies has clearly occurred in ICTs. Non-ICT specialist industries increasingly develop, rather than just utilise, the cluster of ICT-related technologies. We conclude that the development of corporate capabilities in the key technologies of the emerging ICT paradigm is more widespread than previously emphasised in the literature. One implication of this observation is that technological diversification and the information revolution may be related phenomena.     

我国金字塔型控股结构下的大股东利益侵害行为研究

我国上市公司普遍存在"大股东"现象。大股东通过金字塔型的控股结构获得超额控制权,并"挖空"上市公司的资源,损害了广大中小股东的利益。本文在考虑我国上市公司金字塔型控股结构的基础上,构建大股东利益侵害行为模型,系统探讨了影响利益侵害行为的因素,并提出了制约大股东"隧道挖空"行为的对策。     

某工程钢筋混凝土框架柱的加固处理

某框架-剪力墙结构高层建筑的钢筋混凝土框架柱，在施工过程中局部出现了超出规范允许值的垂直度偏差，影响了结构性能。经验算后，采用加大截面的加固补强方案，同时采取有效的施工构造措施，保证了新旧混凝土的有效黏结和新加钢筋的锚固连接，并对框架柱进行了加固处理。