中低层灵活就业群体的异同分析与对策

中低层灵活就业群体主要由下岗工人与农民工组成,他们是就业群体中的弱势群体,如何对他们进行更好的制度安排,促进灵活就业的发展,对于缓解就业压力有着积极的意义.中低层灵活就业中的两大类群体在就业方面既存在共性又存在区别,对此进行分析能更好地促进他们实现灵活就业,并为政府采取有针对性的措施提供参考.     

CHC水泥集团库存优化管理解决方案

库存管理作为生产管理的重要内容,是企业降低成本,增强市场竞争优势,提高经济效益的重要手段。论文在对CHC（嘉新京阳）水泥集团库存控制现状进行分析的基础上,揭示了该集团库存管理所存在的问题,提出了CHC水泥集团库存控制策略和控制模型;同时,为保证库存控制策略的实施,结合实际情况,对CHC水泥集团库存业务流程和组织进行了调整,并将信息管理系统升级到ERP系统以配合库存管理新策略实施。     

多元化战略在中国旅游企业中的实施效率分析

文章对我国旅游企业的多元化战略管理进行了调查分析,从中总结出旅游企业的多元化战略实施的效率与非效率性的原因。     

INTEREG: A Twenty-region Input–Output Model for Italy

Since the regional scale turns out to be the scale at which fiscal devolution is likely to be accomplished in Italy, and that at which trade and growth interdependencies as well as regional convergence can be most conveniently investigated, a new 20-region input–output model for Italy seems to be a useful tool of analysis. Although various regional and interregional models have been constructed since the 1950s, none has been implemented for the whole system of 20 Italian administrative regions considered in their tight mutual dependence; also, the pool approach has not been greatly favoured, even in situations where direct information on regional trade is lacking. The main purpose of this paper is to report on the structure of the model, the rather complex procedure used in the model construction and the adopted solution technique. Some space is devoted to the problems encountered in handling regional trade endogenously in an input–output setting and to a comparison between the pool approach, used in the Italian model, and other current techniques. The paper also reports on some preliminary results regarding the regional impact of fiscal policy.     

Linking performance drivers in production planning and inventory control to process choice

This study investigates how process choice relates to production planning and inventory control decisions. We empirically examine the validity of deductively derived patterns about these types of decisions. More importantly, we look for normative insights by exploring how production planning and inventory control decisions affect operations performance. Our findings show that production line and continuous flow plants use more of a level production strategy, and carry less raw material and work-in-process inventory. The performance drivers for these plants, through which the operations function excels, are effective utilization of equipment, reduced finished goods inventory, and reduced setup down time. To gain forward demand visibility and batching economies, job and batch shops rely much more on backlogs in their planning process. These plants use more of a production chase strategy and position inventory lower in the bills of materials. Four performance drivers for top-performing job and batch shops are to find ways that better anticipate customers' orders, have a more responsive chase strategy, carry less raw material or purchased inventory, and shorten production planning horizon, partly through less reliance on backlogs. It is intriguing that top-performing plants not only do the expected things, given their choice of process, but also excel in selected dimensions—some of which fit the profile normally associated with a different process choice. To monitor and continuously improve operations, evaluation ‘scorecards’ should pay particular attention to performance drivers, which change depending on the plant's process choice.     

Monotonicity of Rank Statistics in some Non–parametric: Testing Problems

For some non–parametric testing problems (one–sided two–sample problem, k –sample trend problem, testing independence against positive dependence) a partial ordering, denoted by ≥, over the alternatives is defined. This partial ordering expresses the strength of the deviation from the null–hypothesis. All familiar rank tests turn out to become more powerful under "increasing" alternatives; that is, all familiar rank statistics preserve the ordering stochastically in samples whenever it is present between underlying distributions. As a tool, the sample equivalence of ≥ is introduced as a partial ordering over pairs of permutations. Functions, defined on pairs of permutations, which preserve this ordering are studied.     

上市公司如何在非理性世界中确定股权回报率

确定股权回报率是进行长期投资决策的关键步骤,但在现实非理性世界中难以直接运用传统财务理论所推荐的资本资产定价模型来确定股权回报率。针对FAR与NEER方法,本文首先探讨这两类方法的理论依据并揭示其本质内涵,然后说明:在非理性世界中,如果上市公司管理者追求公司价值最大化目标,那么就应该基于公司项目的基本风险来确定股权回报率;相反地,如果管理者追求近期股价最大化,那么就应该基于市场投资者的预期来确定股权回报率。     

上市公司偏好低现金股利政策的理论思考

上市公司偏好低现金股利政策,损害了中小投资者的利益,加剧了市场投机行为,降低了经营者的风险意识,已成为我国资本市场正常运行与健康发展的一大障碍。本文通过分析我国上市公司偏好低现金股利政策的负面影响和成因,据此提出相关的政策建议。     

Modelling of repairable systems with various degrees of repair

The availability of a stochastic repairable system depends on the failure behaviour and on repair strategies. In this paper, we deal with a general repair model for a system using auxiliary counting processes and corresponding intensities which include various degrees of repair (between minimal repair and perfect repair). For determining the model parameters we need estimators depending on failure times and repair times: maximum likelihood (ML) estimator and Bayes estimators are considered. Special results are obtained by the use of Weibull-type intensities and random observation times.     

Testing equality of variances in the analysis of repeated measurements

The problem of comparing the precisions of two instruments using repeated measurements can be cast as an extension of the Pitman-Morgan problem of testing equality of variances of a bivariate normal distribution. Hawkins (1981) decomposes the hypothesis of equal variances in this model into two subhypotheses for which simple tests exist. For the overall hypothesis he proposes to combine the tests of the subhypotheses using Fisher's method and empirically compares the component tests and their combination with the likelihood ratio test. In this paper an attempt is made to resolve some discrepancies and puzzling conclusions in Hawkins's study and to propose simple modifications.
The new tests are compared to the tests discussed by Hawkins and to each other both in terms of the finite sample power (estimated by Monte Carlo simulation) and theoretically in terms of asymptotic relative efficiencies.