Probability theory in fuzzy sample spaces

This paper tries to develop a neat and comprehensive probability theory for sample spaces where the events are fuzzy subsets of The investigations are focussed on the discussion how to equip those sample spaces with suitable -algebras and metrics. In the end we can point out a unified concept of random elements in the sample spaces under consideration which is linked with compatible metrics to express random errors. The result is supported by presenting a strong law of large numbers, a central limit theorem and a Glivenko-Cantelli theorem for these kinds of random elements, formulated simultaneously w.r.t. the selected metrics. As a by-product the line of reasoning, which is followed within the paper, enables us to generalize as well as to bring together already known results and concepts from literature.Acknowledgement. The author would like to thank the participants of the 23rd Linz Seminar on Fuzzy Set Theory for the intensive discussion of the paper. Especially he is indebted to Professors Diamond and Höhle whose remarks have helped to get deeper insights into the subject. Additionally, the author is grateful to one anonymous referee for careful reading and valuable proposals which have led to an improvement of the first draft.This paper was presented at the 23rd Linz Seminar on Fuzzy Set Theory, Linz, Austria, February 5–9, 2002.     

On estimating the mean of the selected normal population under the LINEX loss function

Following Parsian and Farsipour (1999), we consider the problem of estimating the mean of the selected normal population, from two normal populations with unknown means and common known variance, under the LINEX loss function. Some admissibility results for a subclass of equivariant estimators are derived and a sufficient condition for the inadmissibility of an arbitrary equivariant estimator is provided. As a consequence, several of the estimators proposed by Parsian and Farsipour (1999) are shown to be inadmissible and better estimators are obtained. Received January 2001/Revised May 2002     

我国行业协会的性质和功能研究——从交易成本和规制角度分析

随着我国加入WTO以及市场经济体系的逐步完善,作为同行业企业联合的服务性组织——行业协会将在经济发展中发挥越来越重要的作用。但是长期以来,我国行业协会的性质和功能的定位一直比较模糊。本文从交易成本和交易规制结构出发,对我国行业协会的性质和功能进行界定:即行业协会的本质是一组企业契约联合体,行业协会最核心的功能在于降低成员企业的交易成本。     

Productivity and Welfare

Technical change is generally characterized by a rate and biases, both evaluated for given producer prices. This paper examines the potential discrepancy between this rate and the corresponding rate of consumer welfare change as measured by Allais distributable surplus. We postulate a general equilibrium context with various market failures (taxes, quotas, imperfect competition, and “poorly priced” commodities), and use comparative statics to express the rate of welfare change in terms of the rate and biases of the technical change. An elementary simulation model of a taxed economy suggests that the rate of welfare change may differ from the rate of technical change by as much as 50% under plausible circumstances.     

应用二级CES生产函数对中国制造业R＆D投入产出效应的实证研究

进入知识经济时代，科学技术成为重要的生产要素，而科技创新活动中最重要的是R＆D活动。本文试图从生产过程技术关系的角度，实证地研究目前我国企业R＆D活动的投入产出效应。首先我们在生产函数的投入要素向量中引入R＆D投入变量，然后结合相关的研究经验和本文的研究目的，选择二级CES生产函数模型，并对这类模型的参数估计方法进行了探讨。在此基础上，采用2003年上海主要制造业企业的横截面数据，实证研究了企业R＆D投入的产出效应，以及投入要素之间的替代关系，得到了一些具有启发性的结果。     

Moral suasion: An alternative tax policy strategy? Evidence from a controlled field experiment in Switzerland

With data gained from a controlled field experiment in Switzerland this paper analyses the effects of moral suasion on the timely paying and the timely filling out of the tax form 2001. Comparisons of different tax filing years and multiple regression estimations have been done using these two factors as dependent variables to check if there is a significant difference between the control group and the treatment group. In February 2002 the treatment group received a letter signed by the communes fiscal commissioner containing normative appeals. Results indicate that moral suasion has hardly any effect on taxpayers compliance behaviour. The strongest effect can be observed for the variable tax payments.Received: February 2003, Accepted: June 2004 JEL Classification: H260, H710BennoTorgler: Special thanks are due to the tax administration of Trimbach, especially to Adolf Müller and Gary Bitterli, who offered me the opportunity to collect the data and assisted the project. Furthermore I acknowledge the financial support of the WWZ-Forum and Swiss National Science Foundation and comments and suggestions from Doris Aebi, René L. Frey, the editor Kai A. Konrad and two anonymous referees.     

人性化十字路口简单立交

从目前我国城市交通现况切入，较为详细地介绍了杭州中北路口和武汉徐东路口改造前、后的情况；结合改造后出现的问题，提出了十字路口简单立交的具体可行方案，作出了较为详细的分析探讨，并给出了应用建议。     

渠道压缩:中间商该何去何从?

中间商的出现是为了满足生产商和市场对于渠道的需求而产生的。但随着生产商和市场的发展,其对于渠道的需求也在发生着变化。同时外部条件的变化也影响着生产商对渠道的需求。本文从生产商对渠道的需求的角度以及中间商满足需求的能力的角度来分析中间商的发展趋势。     

虚拟企业核心竞争力的评判研究

虚拟企业是在网络经济时代出现并蓬勃发展的一种形式,具有突出的核心竞争力。识别虚拟企业的核心竞争力,是虚拟企业成功运作的关键一步,可以通过采用模糊数学集合论与层次分析法相结合的模糊综合评价法。通过一个仿真算例,说明该种方法的有效性。