A unified approach to bivariate discrete distributions

Here we introduce a bivariate generalized hypergeometric factorial moment distribution (BGHFMD) through its probability generating function (p.g.f.) whose marginal distributions are the generalized hypergeometric factorial moment distributions introduced by Kemp and Kemp (Bull Int Stat Inst 43:336–338,1969). Well-known bivariate versions of distributions such as binomial, negative binomial and Poisson are special cases of this distribution. A genesis of the distribution and explicit closed form expressions for the probability mass function of the BGHFMD, its factorial moments and the p.g.f.’s of its conditional distributions are derived here. Certain recurrence relations for probabilities, moments and factorial moments of the bivariate distribution are also established.     

论党政领导干部任期经济责任审计功能拓展

党政领导干部的任期经济责任愈加明确与强化促使党政领导干部任期经济责任审计功能从简单的“合法性”监督向“四E性”评价方向拓展,进而引起任期经济责任审计评价内容、评价方法、评价指标上的创新。     

价值工程在建设项目投资控制中的应用

在项目建设过程中,当我们将价值工程的理念应用于工程项目管理的投资控制领域时,建设项目投资自然而然地成为价值研究的对象。我们可以将建设项目的功能加以分析,然后与具体实施外部环境、经济技术的要求及投资估算相对应,应用价值系数评价来进行建设项目实施方案的创新,然后确定实施方案或者对实际方案进行改进,可以达到提高投资决策及实施水平的目的。     

产品功能创新战略——创新战略的突破

陈圻教授所写的《中国式蓝海战略——产品功能创新战略及其竞争力评价》一书,提出了产品功能创新战略,并对这种新的战略作了竞争力评价,令人耳目一新。本文就产品功能创新战略作了一些论述。     

Determining the optimal process means under mixture normal distributions

In this paper, we consider that the working environment has certain states, and in every state, the parameters of quality characteristics are different. Thus, if we set the characteristics parameters in a specified state, these parameters will change to another state. To describe this situation, we use a mixture of normal distributions, which comprise a flexible and powerful statistical-based modeling tool in practice. Under the step loss function and the piecewise linear loss function, we select the optimal means for the proposed manufacturing process.     

技术中介市场作用机制及其声誉的模型探讨

随着我国技术市场的不断完善和发展,技术中介的作用日益凸现。本文从技术中介的重要作用出发,探讨了客户在选择技术中介时中介机构声誉的重要性、影响技术中介声誉的因素以及技术中介与客户相互作用的机制。     

可靠性理论在价值工程中的应用

可靠性理论中的核心概念“可靠度”在数值分析时,可以作为价值工程中“功能”相当的量纲。为保证贵重药品生产不间断而决策“贮备系统”的例子表明,可靠性理论和价值工程的结合能产生相当良好的效果。     

企业工会职能建设创新探讨

为了提高服务职工的质量,维护职工群众的切实利益,企业工会需要做好本职工作,创新工作模式。为此,本文从企业职工的民主权利、切身利益、素质、身心健康、基本利益五个方面进行分析和研究,进而为企业工会职能建设奠定基础和提供保证。     

Introducing Environmental Variables in Nonparametric Frontier Models: a Probabilistic Approach

This paper proposes a general formulation of a nonparametric frontier model introducing external environmental factors that might influence the production process but are neither inputs nor outputs under the control of the producer. A representation is proposed in terms of a probabilistic model which defines the data generating process. Our approach extends the basic ideas from Cazals et al. (2002) to the full multivariate case. We introduce the concepts of conditional efficiency measure and of conditional efficiency measure of order-m. Afterwards we suggest a practical way for computing the nonparametric estimators. Finally, a simple methodology to investigate the influence of these external factors on the production process is proposed. Numerical illustrations through some simulated examples and through a real data set on Mutual Funds show the usefulness of the approach.JEL Classification: C13, C14, D20     

A new bivariate distribution in natural exponential family

We propose a new bivariate distribution following a GLM form i.e., natural exponential family given the constantly correlated covariance matrix. The proposed distribution can represent an independent bivariate gamma distribution as a special case. In order to derive the distribution we utilize an integrating factor method to satisfy the integrability condition of the quasi-score function. The derived distribution becomes a mixture of discrete and absolute continuous distributions. The proposal of our new bivariate distribution will make it possible to develop some bivariate generalized linear models. Further the discrete correlated bivariate distribution will also arise from an independent bivariate Poisson mass function by compounding our proposed distribution (Iwasaki and Tsubaki, 2002).Received March 2003