试论兰州城市民俗的特点

兰州城市民俗以本土文化为基础,经过长期的传承变异,呈现出以下特点:继承传统,发展创新;去陋存新,健康文明;兼收并蓄,对外开放;追逐时尚,引领潮流;西俗东渐,洋为中用。把握兰州城市民俗的特点,合理保护、开发和利用民俗为城市发展服务,是延续城市民俗生命力的主要途径。     

淮北矿业集团安全文化的创新与实践

结合煤矿实际,从安全宣传教育、安全文化、安全生产体系3个方面,论述了淮北矿业集团在安全文化建设上的系统谋划、理论创新与具体实践。     

“小汽车家庭化”与宏观交通决策

我国部分城市和沿海发达地区已经进入“小汽车家庭化”的阶段。家庭对私人小汽车的需求极大地推动了我国汽车工业及其相关产业链的发展,但也带来了一系列严重的交通问题。根据对国外不同城市交通发展模式的分析,结合我国的具体国情,我国的宏观交通决策仍应坚持公共交通为主导,适度鼓励发展节能环保的微型汽车,对私人小汽车的使用方式进行引导,同时通过城市道路系统的改造和建立先进的交通管理系统,应对“小汽车家庭化”带来的挑战。     

Group competition for rents

This paper examines rent dissipation in a two-stage group rent-seeking contest without a predetermined distribution rule. the rent in this setting exhibits both public and private good characteristics depending on the stage of the contest. Focusing on the relationship between group size and aggregate rent seeking we find that social waste depends not only on total numbers but also on the distribution of population across groups. We show that group size asymmetry acts to reduce rent dissipation.     

On the (nonlinear) relationship between exchange rate uncertainty and trade — An investigation of US trade figures in the group of seven

In this paper bilateral models formalizing monthly growth of US imports and exports are employed to investigate the potential of nonlinear relationships linking exchange rate uncertainty and trade growth. Parametric linear and nonlinear as well as semiparametric time series models are evaluated in terms of fitting and ex ante forecasting. The overall impact of exchange rate variations on trade growth is found to be weak. In periods of large exchange rate variations, trade growth forecasts gain from conditioning on volatility. Empirical results support the view that the relationship of interest might be non-linear and, moreover, lacks homogeneity across countries and imports vs. exports. JEL no. C14, C22, F31, F41     

An algebraic theory of portfolio allocation

Summary. Using group and majorization theory, we explore what can be established about allocation of funds among assets when asymmetries in the returns vector are carefully controlled. The key insight is that preferences over allocations can be partially ordered via majorized convex hulls that have been generated by a permutation group. Group transitivity suffices to ensure complete portfolio diversification. Point-wise stabilizer subgroups admit sectoral separability in fund allocations. We also bound the admissible allocation vector by a set of linear constraints the coefficients of which are determined by group operations on location and scale asymmetries in the rate of returns vector. For a distribution that is symmetric under a reflection group, the linear constraints may be further strengthened whenever there exists an hyperplane that separates convex sets. Received: May 15, 2001; revised version: March 20, 2002 RID="*" ID="*" Journal paper No. J-19797 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa. Project No. 3463, and supported by Hatch Act and State of Iowa funds. Correspondence to: D. A. Hennessy     

国外统筹城乡发展理论研究述评

国外统筹城乡发展理论研究轨迹可以总结为"三观"之变:从20世纪50年代前期的朴素城乡整体观发展到后来的城乡分割发展观,随后发展到20世纪80年代以来注重城乡联系的城乡融合发展观.综现国外统筹城乡理论多年来的研究,其主要特点表现为注重发展中国家城乡差异与区域之间的比较,注重空间分析与社会因素相结合.国外相关研究也存在定量研究过少,理论假定过窄的不足.     

城市交通问题的产权分析

通过对多个城市的观察,发现《中华人民共和国道路交通安全法》的许多条款形同虚设,得不到切实的执行。本文根据产权理论对这一现象进行了分析,解释当前城市交通问题的主要成因即：车辆的增多、无法识别、十字路口和交通意识。产权的主要作用是帮助人们形成与他人交流的信息的预期,有了清晰界定的产权,就可以减少城市交通中人与人之间的不确定性,减小冲突的发生。为此,本文提出了解决城市交通问题的政策建议,即限制行车数量、增强非机动车辆的识别能力和规范十字路口标识,提高公民城市交通意识。通过减少交易成本,清晰的界定产权等手段规范城市交通,从而帮助行人建立稳定的预期,保证道路畅通。     

城市社区党建:构建社会主义和谐社会的关键

城市社区党建作为基层党建的重要组成部分,一直受到党和国家的高度重视。加强城市社区党建对于夯实城市基层党组织、巩固党的执政地位和保持党的先进性具有至关重要的意义。在新的历史时期,为了保持社会的持续稳定发展,构建社会主义和谐社会,必须进一步加强城市社区党建。     

淮南矿业集团加强企业文化建设的探索与实践

结合淮南矿业集团有限责任公司企业文化建设实践,分析了企业文化建设形成和发展历程,探讨了企业文化建设的途径。同时指出创建一流的企业文化,是一项系统工程,是一个长期的渐进过程。