国有股权治理与经营绩效

最近有关民营与国营企业的治理效率的讨论异常激烈,但较多的争论都是采用规范研究或者案例分析的方法,而国内较多的经济学者较早时候采用实证研究方法得出的结论大都为民营企业治理效率高于国有企业,本文采用中国证券市场运作相对成熟的1999-2003五年间的数据进行实证研究,对国有控股与非国有控股进行实证分析,得出的结论为国有控股企业平均业绩高于民营企业。这里当然有国有上市公司中一部分垄断性企业获取了垄断收益的影响,但是国有上市公司近年来不断提高业绩以及民营企业最近借壳上市后导致上市公司形成巨大亏损的事实都与本文的结论暗合。     

不完全竞争、交易效率和证券风险

本文提出了一种崭新的理论观点———不完全竞争的市场结构是证券风险的一个重要来源,并利用市场数据进行了实证分析。此外,本文还发现不完全竞争的市场结构会通过影响买卖双方的交易策略而降低市场的交易效率。     

从"兼顾公平"到"更加注重公平"的若干思考

自党的十四大以来,关于效率和公平的提法,经历了“兼顾效率与公平”———“效率优先、兼顾公平”———“更加注重公平”的三大变化。每一个提法都有客观背景,其中“效率优先、兼顾公平”的提法占统治地位12年之久。目前,这一提法已经不符合当前形势的要求,应由“更加注重社会公平”来取代,这是促进社会和谐的要求。     

税收正义刍论

税收正义是当前税制改革的前提规范。一个税收体制公正合理性的基础是平等课税、公平税负、效能化税收的真正体现。构建社会主义“和谐社会”需要一个公正合理的税收制度的支撑,需要一个真正实现了程序正义、结果正义和制度正义的税收体制的建构。因而,现代税收制度的建构呼吁税收正义的实现。     

The Informational Efficiency of the Equity Market As Compared to the Syndicated Bank Loan Market

The loan market is a hybrid between a public and a private market, comprised of financial institutions with access to private information about borrowing firms. We test whether this is reflected in informationally efficient price formation in the loan market vis-a-vis the equity markets, and reject this private information hypothesis. We also reject a liquidity hypothesis which suggests that equity markets always lead loan markets, despite bank lenders' access to private information, because of greater liquidity in equity markets. We further test, and reject, an asymmetric price reaction hypothesis that states that loan returns are more sensitive to negative information whereas equity returns respond symmetrically to both positive and negative information. We find evidence most consistent with an integrated markets hypothesis that suggests that both the equity and syndicated bank loan markets are highly integrated such that information flows freely across markets. This is particularly true when the equity market makers are also loan syndicate members.      

中国经济真的动态无效吗

史永东与杜两省、史永东与齐鹰飞、袁志刚与何樟勇相继考察了中国经济的动态效率,结果均表明中国经济是动态无效的.本文首先通过实证研究进一步检验上述结论,并进而追问中国经济为什么会发生动态无效.笔者的分析表明,这种无效性只是一种表象,它是由我国的粗放式经济增长方式决定的,其根源在于静态资源配置,特别是投资配置的无效性.在此基础上,本文进而指出,上述作者提出的消除无效性的政策建议是不恰当的,真正有效的途径只有转变增长方式,提高增长绩效.     

我国现行融资制度功能的理论及实证分析

内生于经济增长的融资制度应具备筹资功能、降低交易成本功能、价格发现功能、流动性功能和风险转移功能等五方面的功能.我国现行融资制度基本能够有效地进行储蓄动员,但在向资本转化方面存在着一定的障碍;作为公共资源的政府融资仍然发挥着相当重要的作用,但金融市场对经济的促进作用有进一步弱化的趋势;在地区间和企业间存在着资源的逆配置现象,总体上资本的运用效率较低,而非正规金融发挥了不可或缺的作用;严格的利率管制使中介的价格发现功能几乎没有,而市场的价格发现功能一直较弱;此外,存在较高的交易成本,流动性水平整体较低,风险转移功能也相对缺乏.     

On the source of contrarian and momentum strategies in the Italian equity market

This paper investigates the source of momentum profits, while inferring the validity of the assumptions underlying rational and behavioural theories. Using a unique sample of securities listed in the Italian Stock Exchange from 1950 to 1995, we observe that buying better performing stocks in the previous 3-12 months and selling worse performing stocks over the same period yields significant profits in the short term (less than 1 year). Results also hold when conditioned upon different risk specifications. On the other hand, the continuation effect seems to significantly revert over a longer period. More importantly, in contrast with Conrad and Kaul [Rev. Financ. Stud. 11 (1998) 489], bootstrap and Monte Carlo simulations show that momentum profits are more likely to be generated by stock returns time series properties rather than by their cross-sectional differences. While the overall findings cannot reject the market efficiency hypothesis, we argue that behavioural theory may be a possible “story” to interpret the continuation effect.     

天然气管道工程技术发展水平及推广应用

介绍了国内外天然气管道工碍技术发展水平，针对我国天然气管网建设的实际，提出了天然气管网系统分析、数字化管道、自动焊、全自动超声波检测、干空气管道干燥、新管道智能检测等6项值得推广应用的新技术。     

Performance of Moving Average Trading Rules in a Volatile Stock Market: The Russian Evidence

This article examines the profitability of dual moving average crossover (DMAC) trading strategies in the Russian stock market over the 2003–12 period. It contributes to the existing technical analysis (TA) literature by testing, for the first time, the applicability of ordered weighted moving averages (OWMA) as an alternative calculation basis for determining DMACs. In addition, this article provides the first comprehensive performance comparison of DMAC trading rules in the stock market that is known as one of the most volatile markets in the world. The results show that the best trading strategies of the in-sample period can also outperform their benchmark portfolio during the subsequent out-of-sample period. Moreover, the outperformance of the best DMAC strategies is mostly attributable to their superior performance during bearish periods and, particularly, during stock market crashes.