Partition ratios, Pareto optimal cake division, and related notions

We consider the problem of partitioning a ‘cake' C among n players. Various criteria have been considered for deciding whether a partition P₁,P₂,…,P_n of C, where piece P_i goes to player i, is a ‘good' partition. See, for example, Barbanel (1996) [Barbanel, J.B., 1996. Super envy-free cake division and independence of measures. J. Math. Anal. Appl. 197, 54–60] or Brams and Taylor (1996) [Brams, S.J., Taylor, A.D., 1996. Fair Division: From Cake-Cutting To Dispute Resolution. Cambridge Univ. Press]. In this paper we study certain real numbers (the ‘partition ratios' of this paper's Section 2) which can be associated in a natural way with any partition. We show that various types of products of these numbers provide us with useful information about certain trades and transfers between players.     

东亚货币一体化中的中日韩货币组合选择

本文对东亚货币一体化的研究建立在最优货币区理论和OCA指数计量模型的基础上，目的在于判断东亚经济中起主导作用的中日韩三国是否可能展开双边或者多边的货币合作。经测算发现，在排除了原模型中部分不适用的决定因素后，中日韩三国货币的共同组合似乎是比较合适的选择。     

PARETO HONOURING POVERTY REDUCTION

Policy reforms often pit the poor against the poor by triggering a fall in poverty for some but an increase in poverty for others. Aggregated national measures gloss over these fine patterns and pronounce ‘a reduction in poverty’– is such aggregation across poor individuals ethically permissible? Addressing this type of aggregation is a hard issue. This paper has made an attempt in that direction by outlining an axiomatically grounded aggregate measure of such gains or losses, duly giving more importance to the losses to a poor compared to the gains of another poor.     

Conditions for Optimality of a Currency Area

Two approaches to the theory of OCA are distinguished in this paper. The first, called the marginalistic approach, attempts to define the OCA from the point of view of a single country, and the second examines the optimality of a currency area of a given membership. The marginalistic approach and its limitations are discussed first. Then, the paper proceeds to the second approach which is discussed in the context of the cooperative game theory in characteristic function form; it argues that a currency area is optimal when the welfare functions of its constituent members are in the core. This implies that the welfare functions of all constituent members of the currency area are maximized and hence they are all better off with a common currency rather than with their own national currencies; hence, no member country has the intention to abandon the currency area. The paper concludes that the condition for the optimality of a currency area independently of the degree of economic similarity of its constituents requires that the characteristic function must exhibit non decreasing returns with respect to its size.     

Active intermediation in a monetary overlapping generations economy

This paper establishes that the profit-seeking activities of private intermediaries can ensure Pareto efficiency in the standard pure-exchange monetary overlapping generations economy without the need for government monetary or fiscal policy intervention. Moreover, these profit-seeking activities are shown to rule out all aperiodic and k-periodic cycles for k greater than 2. Contrary to much recent work on intermediation, the profit opportunities that arise for intermediaries in this context are not due to assumed frictions or asymmetric information. Rather, they are due to the dynamic open-ended structure of the economy, which permits debt roll-over.     

对外贸易摩擦的实证分析

从我国改革开放以来,对外贸易的发展取得了举世瞩目的成就。但随着贸易量的扩大,贸易摩擦逐渐成为困扰我们的"心结"。纵观这个过程,不难发现摩擦的发展其实是符合客观事物的发展规律的。我们可以"顺势而为",只要是"适者","得道"是自然。     

The role of lifetime activity cues in customer base analysis

This paper develops the notion of lifetime activity cues in customer base analysis. The authors first discuss the impact of lifetime indicators, such as customers' conceptual response to marketing activities, and then demonstrate how such lifetime cues can be embedded into the Pareto/NBD model. The authors theoretically analyze the implication of this additional behavioral indication on the model's predictions. In an illustrative example, they aim to establish an intuitive understanding of the effects of such information. Evidence from the cellular phone industry supports the relevance of this concept: The empirical study finds a substantial improvement in predictive accuracy in two independent holdout samples. The study concludes with a discussion of the managerial relevance of the proposed approach and opportunities for further research.     

企业集团的适度规模经济与聚集经济研究——一个基于国际垂直分工视野的分析框架

基于国际垂直分工的理论视野,界定了单体企业的适度规模经济和企业集团总体的最适规模经济等概念范畴的内涵与外延,并结合垂直范围经济和聚集经济等相关概念,从技术经济角度给出了企业集团适度规模经济的模型框架和测度方法,揭示了企业集团在地域上的合理规模即集聚程度与集聚效益之间的倒U字形钟形关系。利用该分析框架,提出了在国际垂直分工视野下,生物医药和专用设备制造等重点行业实现企业集团适度规模经济战略选择的关键在于利用企业集团的集聚经济优势和范围经济优势,并通过产品细分的差别化定位,实现大型企业集团对中小企业集群的策略性替代。     

甘肃矿业产业结构调整与优化问题的思考

从甘肃矿业产业结构演变情况看,主要呈现出以能源和原材料工业比重高的重型工业结构特征,面对国际矿业结构波动较大以及国内市场化加快的趋势,加快全省矿业发展,必须以市场为导向,积极参与国际市场竞争,加速矿业结构调整与优化,尽量减少小矿山数量,实现规模、集团式开发,逐步降低初级矿产品产量,不断提升矿业加工增值能力和效益.     

Pareto Index Estimation Under Moderate Right Censoring

Real claim data sometimes are censored from above at a high value induced by the sum insured. In this note we examine the behaviour of extreme-value methods in such settings and propose an adaptation of the popular Hill (1975) estimator. It is argued that the censoring typically cannot exceed 5% for an effective use of the methods suggested.