股票送转、异常收益和管理层持股比例

中国股市的股票送股、转增(以下简称"送转")往往能够带来异常收益,本文使用事件研究的方法和1999年到2010年的股票送转相关的数据,在同、异方差的假设、按照送转比例和现金红利比例划分不同子样本以及考虑到信息提前泄露而重新定义事件日的情况下,一致的发现了异常收益①的存在,而现金红利会减少送转事件带来的异常收益。本文进一步探究这种异常收益的来源,发现管理层的持股比例会正向显著地影响异常收益,并且这种影响在一系列稳健性检验下依然存在。本文还使用了工具变量,因此克服了可能存在的管理层持股比例的内生性问题。     

对我国金融混业经营模式的探讨

加入WTO后,我国金融业面临着国外金融混业经营的强烈冲击和严峻挑战。在国民经济和社会发展第十一个五年规划稳步推进金融业综合经营试点的精神指导下,探讨在金融业分业经营、分业监管体系下我国混业经营模式的选择已迫在眉睫。金融控股公司具有全能银行模式和分业模式的特点,可以兼顾效率和安全,是适合我国国情的一种金融混业模式的选择。     

美国公司治理模式对我国公司治理的启示

美国公司治理结构被认为是最成功的治理模式之一,我国上市公司在进行股权分置改革的进程中更需要吸取其经验和教训:大力发展外部市场监控体系;逐步完善股权结构,强化公司内部治理结构建设及健全监督激励机制;加强法律监管和执法力度及保护中小股东机制,建立适合我国企业发展的公司治理结构。     

高管变更与现金持有价值

本文基于现金持有市场价值模型,检验了中国上市公司高管变更的治理效应。结果表明,就整体而言,高管变更能够显著提高现金持有的市场价值,意味着高管变更具有治理效应,但这种价值提升效应依赖于公司的治理机制、所有权性质以及高管变更类型。具体表现为：(1)对于治理较差的公司,高管变更能够显著提高现金的市场价值,但在治理较好的公司中并不存在这种价值提升效应;(2)相对而言,国有上市公司中的高管变更能够在更大程度上提高现金的市场价值;(3)改良性变更对公司价值的提升作用大于摩擦性变更,而自然性变更则会降低公司价值。     

Large Shareholdings and Corporate Control: An Analysis of Stake Purchases by French Holding Companies

The paper analyses the value creation benefits of the holding form of organisation in France by empirically examining the effects of non-controlling stake purchases on target shareholder wealth, operational performance and bidder shareholder returns for a sample of 122 stake purchases in French listed companies. The evidence puts into question the ability of holding companies to create value for the firms they purchase stakes in or their own shareholders, adding to the current debate on the relative role played by large shareholders and the external market for corporate control as ultimate disciplining devices.     

A model for holding strategy in public transit systems with real-time information

Holding strategies are among the most commonly used operation-control strategies in public transit systems. These strategies are most effective when used to control services characterized by high frequency. In this paper, a mathematical model for a holding control strategy is developed. Particularly, this model uses real-time information of locations of buses along a specified route. The objective of the developed model is to minimize the waiting time of passengers at all stops on that route. Furthermore, the model developed in this paper is characterized by the flexibility of adopting situations where bus occupancy could be either high, or low. A heuristic is developed to circumvent the complexity of the solution for the problem described. Numerical examples and computational results are presented and discussed.     

基金"重仓股"特征及可预测性研究

基于对1999-2004年我国封闭式基金重仓持有股票的收益结构特征、财务和非财务特征以及重仓股的可预测性研究,结果表明:重仓股在季度末基金持股信息披露前后的累积超常收益(CAR)分化显著,在信息披露之前[-75,-15]内有显著正的CAR,而在信息披露之后[15,75]内有显著负的CAR;重仓股具有明显的可识别特征,基金表现出一定的择股能力;重仓股具有较强的可预测性,Logit模型的预测结果总正确率达到92.9%,通过预测的股票组合可以获得显著正的CAR。     

Howard Hopson’s billion dollar fraud: The rise and fall of associated gas & electric company, 1921–1940

Abstract

This is a case study of financial fraud. The Associated Gas & Electric Company (AG&E), controlled by Howard C. Hopson, was one of the largest utility holding companies of the ‘Roaring 20s’. Hopson’s AG&E rose spectacularly in the market boom and fell hard following the 1929 crash. Hopson tried unsuccessfully to save the company, while simultaneously enriching himself, using financial transactions that ultimately were determined to be illegal. The major policy reaction to the financial manipulations of the period, for which Hopson became a public symbol, was passage of the Public Utility Holding Company Act, which mandated the ‘death’ of most electric utility holding companies.