上市公司关于新股发行募集资金使用的信息披露研究

上市公司良好的会计信息披露是资本市场健康运行的重要内容。从募集资金使用的角度对我国上市公司会计信息披露行为进行研究,提出信息披露的三个动机,包括公布好消息、再融资和降低代理成本。对我国股票市场1995～2000年上市的418家A股上市公司进行实证检验,发现以上三个动机对上市公司的会计信息披露行为都有影响,其中再融资动机的影响最为显著。     

ZigBee技术在智能交通信号灯控制中的应用研究

针对传统的定时切换交通信号控制模型已无法满足日益增长的交通需求,采用ZigBee无线传感器网络技术。设计一种智能控制信号灯系统,根据当前道路的实时情况,将采集的实时信息,通过ZigBee网络,发送到子控制模块。由子控制模块传输到主控制模块,主控制模块对数据进行处理,产生合理的交通信号灯动态配时方案,进行较为合理的道路管理,提高交通效率。实验结果证明该系统利用巨磁阻传感器和加速度传感器,结合对道路情况实时采集,通过ZigBee无线网络传送信息;设备之间通过无线网络连接,无需挖路布线,在智能交通领域具有一定的应用价值。     

MIMO-OFDM系统同步技术研究进展

多输入多输出正交频分复用（MIMO-OFDM）系统对定时偏移和频率偏差极其敏感,并且对时间同步精度要求极高。分析比较了29种具有代表性的MIMO-OFDM系统同步算法的优缺点,指出针对数据辅助类的同步方法,采用共轭、取反等特性构造优良正交性的训练序列是提高时间同步性能的关键,可在时域进行频偏估计和降低参数维数来降低系统计算复杂度;针对非数据辅助类的同步方法,构造计算复杂度较低的代价函数是提高频率同步性能的关键,这些都是MIMO-OFDM系统同步方法值得研究的方向。     

The exit decision in the European venture capital market

This article analyses the exit decision in the European venture capital market, studying when to exit and how it interacts with the exit form. Using a competing risks model we study the impact on the exit decision of the characteristics of venture capital investors, of their investments and of contracting variables. Our results reveals that the hazard functions are non-monotonic for all exit forms and suggest that, in Europe, Initial Public Offering candidates take longer to be selected than trade sales. Moreover our results show that, in Europe, venture capitalists associated with financial institutions have quicker exits (stronger for trade sales), and highlight the importance of contracting variables on the exit decision. An unexpected result is that the presence on the board of directors leads to longer investment durations.     

风险投资机构参与对公司IPO前盈余管理的影响——基于创业板上市公司的数据

基于创业板上市公司数据,对风险投资机构参与及其特征对我国上市公司IPO前的盈余管理影响进行实证检验,结果显示：风险投资机构参与对上市公司IPO前的盈余管理起到了积极的认证和监督作用。在我国,政府性资本占主要地位的风险投资机构更多地发挥了正面认证和监督作用。风险投资机构的声誉和数量对上市公司IPO前的盈余管理发挥了较大作用,风险投资机构的声誉越高、数量越多,上市公司IPO前一年的盈余管理程度越低。风险投资机构总持股比例与盈余管理程度无显著关系。     

Socioemotional wealth and IPO underpricing of family firms

Socioemotional wealth (SEW), i.e., the noneconomic utility a family derives from its ownership position in a firm, is the primary reference point for family firms. Family firms are willing to sacrifice economic gains in order to preserve their noneconomic utility. Thus, we argue that family firms sacrifice IPO proceeds by choosing higher IPO underpricing than nonfamily firms if underpricing helps them protect their SEW. Our empirical results, based on a sample of 153 German IPOs, support our hypothesis. On average, family firms have 10 percentage points more IPO underpricing than nonfamily firms. Copyright © 2014 John Wiley & Sons, Ltd.     

所得税申报中资产时间性差异的调整方法比较

在所得税申报中,资产时间性差异的纳税调整要涉及几个纳税年度,并且一个正常生产经营企业的资产往往处在动态过程中。每年有新增资产,也有出售、报废、到期的资产,要准确无误地对其进行纳税调整,是所得税申报中的一个常见问题也是难点问题。文章通过对所得税申报中资产时间性差异调整的两种方法的比较,确定一种较为简便可行的方法。     

An Empirical Analysis of the Bias and Rationality of Profit Forecasts Published in New Issue Prospectuses

Our study sets out to assess the accuracy of profit forecasts made by IPOs in Hong Kong. We use a variety of measures and tests to examine the accuracy, bias, rationality, and superiority of earnings estimates. The results show that forecast accuracy compares favourably with the findings from the developed economies of Australia, Britain, Canada, and New Zealand. Forecasts are shown to be superior to the predictions from time series models. IPOs tend to underforecast in the sense that actual profits exceed the forecasts. The rationality tests show mixed results. Cross-sectional analyses of forecast accuracy have poor explanatory power although the Big Six reporting accountants are associated with smaller forecast errors.     

我国新股IPO高定价发行原因及对策——新股IPO定价模型研究初探

新股IPO三高现象一直是困扰我国证券市场健康发展的问题之一,2010年11月,中国证监会有针对性地实施了新股发行体制第二轮改革。笔者认为,此次改革之所以没有达到预期效果,主要是对三高产生的根本原因缺乏必要的研究。文章通过构建新股定价模型,从一个全新的角度探究新股IPO三高背后的根本原因,并提出了解决三高的思路与对策,丰富与创新了相关的理论。     

Market timing: A global endeavor

This paper employs daily fund and index data, the classical Treynor and Mazuy timing model, and two multi-factor extensions to measure the market timing ability of global asset allocation funds. These funds differ from traditional global or international funds in that they face fewer investment constraints and are known to actively shift funds across a wide variety of asset classes. When using the classical Treynor and Mazuy timing models, I find evidence of poor market timing ability. However, this evidence disappears when timing ability is examined using two multi-factor models. The results from Treynor and Mazuy are spurious since both multi-factor extensions do a much better job in explaining the variation in average fund returns.