Two new proofs of Afriat’s theorem

Summary. We provide two new, simple proofs of Afriats celebrated theorem stating that a finite set of price-quantity observations is consistent with utility maximization if, and only if, the observations satisfy a variation of the Strong Axiom of Revealed Preference known as the Generalized Axiom of Revealed PreferenceReceived: 12 June 2003, Revised: 9 October 2003, JEL Classification Numbers: D11, C60.Correspondence to: A. Fostel     

PLC输入I/O点数的扩展方法

介绍了 PL C输入 I/ O点数的硬件软件扩展方法 ,为在实际应用中解决 PL C输入点数不足 ,降低系统的硬件费用 ,提出了很好的解决方法     

ES/9000综合业务电话银行系统

本文介绍了如何在ＥＳ／９０００综合业务系统上设计和开发电话银行系统,以及系统的设计方法与特点。     

中国银行新一代系统推广刍议

本文较系统的论述了新一代系统的推广,以及新一代系统推广与建立同城一个电脑中心和解决２０００年问题之间的关系,并提出了一些建设性的意见。     

Estimating the term structures of corporate debt

This paper investigates the corporate bond market by estimating monthly interest rate term structures for investment grade credit classes using both S&P's and Moody's ratings. Term structures are modeled by a piecewise constant forward rate curve and estimated on noncallable coupon paying bonds issued by industrial firms. The iterative estimation algorithm minimizes the sum of squared errors between market prices and model prices while identifying and removing outliers from the sample. Although the forward rate model is successful at pricing corporate debt, additional factors are found to be significant at explaining the residual price error that remains after the forward rate model is fit to market prices. Six necessary no-arbitrage conditions are derived for the term structures of risky and risk-free debt. Occasionally, some of these no-arbitrage conditions are violated and a few violations are asymptotically statistically significant. Finally, trading strategies that capture mispricing in the corporate debt market and violations of no-arbitrage bounds are discussed.This paper was adapted from my dissertation, completed at Cornell University. An earlier version of this paper was titled The Term Structures of Corporate Debt. Thanks to participants at the Cornell University finance workshop, Warren Bailey, Peter Carr, Antoine Giannetti, and especially Robert Jarrow for their helpful comments.     

Problem-solving in teaching/learning packages for Technology

In the project Technology in Secondary Education: Problem-solving in Teaching/learning Packages, two experiments regarding a construction problem and an explanation problem were conducted, in which two variants of a teching/learning package (strongly structuredvs. weakly structured) were compared. Only with the strongly structured instructional variant of the package for the explanation problem did the pupils come to a quick solution of the problem. In both experiments, the factors that influenced the problem-solving processes of the pupils were investigated. The results are of importance for curriculum developers and the authors of teaching/learning packages for Technology but further research into the factors influencing the problem solving process of pupils is necessary.     

有线电视光缆传输系统指标的分析与设计

介绍了有线电视网中ＡＭ 光缆干线传输综合指标的分析与设计。由于ＤＦＢ激光器间的非线性有较大差异,故引入了光链路这一参数。当把这一参数引入有线电视光缆干线设计时,可根据有线电视光缆系统不同传输距离、光接点的分配指标和光缆干线传输系统的实际情况,计算光链路损耗,以确定光端设备的选型,从而进一步确定光缆干线传输系统的设计,使得有线电视总系统指标给以保证     

Accounting and Competitive Tendering in UK Local Government: An Institutionalist Interpretation of the New Public Management

The paper applies institutional theory to analyse the changing role of accounting and contracting in UK local government as the compulsory competitive tendering (CCT) regime was extended to white-collar activities such as housing management, finance, legal services and information technology. Employing an organizational fields model, accounting changes were seen to be influenced by a combination of legal coercion, normative and competitive forces, the resistance and manipulation of the large local authorities together with the facticity of the new accounting and contracting regimes. The theoretical framework is applied to field-work carried out in a large metropolitan authority in the north of England where CCT methodologies directly affected housing management but not other services such as finance. Although resisting CCT for finance, the authority subsequently introduced a radical scheme of voluntary competitive tendering for selected finance processes. The paper examines how accounting and contracting may be adapted to emerging trends in the New Public Management associated with Best Value policies.     

价值运筹——价值工程在世※界经济新运行形态下的发展

认知世界经济的巨大变化需要新的观念,人类经济总体发展模型又称“四方式二形态”假说,可以作为研究经济和管理问题的基本框架和准则。由此得出当前世界经济按功能经济形态运行。列出了一些与物质经济运行形态不同的主要的新特征。总结出六条关于功能价值的基本原理,以供处理有关问题之用。给出了“价值运筹”的定义,指出价值运筹的实质是“智能经营”,因此“全员价值运筹”是必然的选择。它将推动企业管理创新     

Managerial judgment and forecast combination: An experimental study

This paper examines the role of managerial judgment in forming a final forecast, or judging the achievability of a critical level of sales, when multiple forecasts or opinions are available to the decision maker. Several factors that can help improve the quality of human intervention are identified and incorporated in a decision aid. Experimental results show that aided combination can help the decision maker exploit her relevant private information and mitigate the generally observed negative effects of human intervention. Further, the results suggest that emphasizing expected sales, even when the organization is primarily interested in go/no-go decisions, helps improve performance. Several suggestions for future research are presented.

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