Production-location decision and free entry oligopoly: A correction

This paper shows that there is no interior solution in Mai–Hwang's 1992 oligopolistic location model with free entry when the production function exhibits constant or decreasing returns to scale. The comparative static results of the impact of a demand change on the location decision only apply to the case where the production function exhibits increasing returns to scale. It re-examines the impact of a demand change on the location decision of an oligopolistic firm and corrects the propositions derived by [C.C. Mai, H. Hwang, Production-location decision and free entry oligopoly, Journal of Urban Economics 33 (1992) 252–271. Reprinted in: M.L. Greenhut, G. Norman (Eds.), The Economics of Location, vol. I: Location Theory, Edward Elgar, Aldershot, 1995].     

基于遗传算法的核函数参数优化

核主分量分析是一种输入输出特征非线性变换技术。选择最优或接近最优的非线性变换核函数参数,使类的可分性测度最大,是KPCA应用于特征提取的关键。本文采用高斯变异遗传算法作优化技术,实现了KPCA和GA的集成,适合核函数参数的优化选择。仿真表明,该技术可行、有效。     

Optimizing the credit term decisions in supply chain finance

We study a credit term determination problem in the context of a supplier-buyer supply chain. The supplier's credit term decision is simultaneously made with its production and inventory decisions, and most importantly, it is impacted by the buyer's order quantity. We present a new game-theoretic framework to model this problem, which captures the interaction between the supplier's credit term decision and the buyer's order decision in a multi-period setting. An exact method based on nonlinear programming is implemented to obtain the optimal solutions. We apply our methodologies on a real world case. The computational results show that our approach significantly outperforms the heuristics with fixed credit terms, and either a short or a long credit term can be sub-optimal for the supplier in profitability. Our work offers the first data-driven model and solution approach that assists purchasing and supply managers to make optimal dynamic credit term decision in conjunction with production, ordering and inventory decisions in a game-theoretic setting.     

21世纪桂林旅游业发展问题研讨

为使桂林旅游业在２１世纪能够有大的作为,并在激烈竞争的国际旅游市场上立于不败之地,针对桂林市旅游业现存的问题,就桂林旅游企业改革、城市定位、旅游法制建设、旅游产品开发、旅游意识建设５个方面进行了较为深入的探讨     

论中小股东权益之法律保护

中小投资者是证券市场发展的根本。但由于大股东在公司中的地位,使得中小股东权益一直没有得到充分的尊重和保护。文章从中小股东权益保护必要性分析入手,立足我国中小股东权益保护的现状分析,着重论述完善中小股东权益保护机制的建议和意见。     

会计计量与企业债券信用评级关系的应用分析——基于2006年新会计准则的思考

企业债券信用评级是企业发行债券的重要步骤,债券评级对会计信息具有依赖性,而会计信息的计量属性会直接影响会计信息,不合适的会计计量属性会对债券评级造成负面影响。本文结合2006年的新会计准则的相关规定和企业债券信用评级的特点,通过分析会计计量对信用评级的误导因素,认为借鉴国际先进经验,可以提高债券评级的可靠性和客观性,促进企业融资市场的公平性和公正性。     

精益物流

从精益物流的历史背景、内涵、方法等角度全面介绍了精益物流这一崭新的物流管理思潮。     

完全且完美信息动态博弈在开放式基金风险分析中的应用

本文首先阐述了开放式基金的概念和风险性,然后用完全且完美信息动态博弈理论对开放式基金投资中存在的风险进行了分析,揭示了开放式基金流动性风险的本质,最后给出了一些合理化建议。