港口与腹地经济关系研究——以宁波港为例

以宁波港为例,首先选取宁波、杭州、温州3个腹地城市进行分析,以集装箱吞吐量和直接腹地综合工业总产值两个指标来研究港口与腹地经济的关系。综合工业总产值是由这3个城市的工业总产值的加权和计算而得,权重由相对引力模型确定。实证分析表明,港口与腹地经济之间存在着长期稳定的关系,且在10%的显著性水平下,它们互为格兰杰原因。脉冲响应分析表明,腹地经济的增长对港口的发展存在着不太明显的正向推动效应,而港口的发展则对腹地经济增长存在着很明显的正向拉动效应。最后根据研究结果对港口与腹地经济互动发展提出了政策建议。     

基于相对资源承载力模型的研究

首先分析了相对资源承载力模型存在的不足,即未考虑各类资源间的匹配以及权重取值过于主观,并对其进行了改进。然后应用改进后的模型对新疆1978—2008年可持续发展情况进行了实证分析,研究表明:①1978—2008年,新疆相对耕地资源承载力最大,其次是耕地和经济资源均衡承载力,经济资源承载力最弱;②新疆的相对综合承载力和过剩人口1978—2000年呈递增趋势,而2001—2008年处于逐渐恢复和扩张的态势;③新疆人口目前仍处于过剩状态。同时比较分析了模型改进前后的实证结果,并对新疆人口的可持续发展提出了一些建议。     

我国水资源利用相对效率的时空分异与影响因素

水资源短缺成为经济发展中重要的制约因素,目前解决这一问题最行之有效的途径就是提高用水效率。根据我国内地31个省、自治区、直辖市1997年到2006年的相关数据,选择生活用水、生产用水以及最基本的生产要素劳动力、固定资产投资等作为输入指标,以国内生产总值(GDP)为输出指标,运用数据包络分析方法计算出各指标的规模冗余率,利用改进的数据包络分析方法计算出各指标的技术冗余率,进而计算出用水相对效率,并对用水相对效率在时空上的分异特征进行了研究。采用典型相关分析模型研究了水资源利用相对效率的影响因素,为水资源的合理利用提供借鉴和参考。     

基于相对价格线的里昂惕夫之谜的理论探讨

对里昂惕夫之谜的现有解释只是就里昂惕夫之谜解释里昂惕夫之谜,而没有跳出里昂惕夫之谜的思想框架。利用生产可能性边界、社会无差异曲线和相对价格线分析工具,通过几何方法,分析消费均衡点和生产均衡点的不同位置关系,可以认定理论上确实存在里昂惕夫之谜,我们可以通过国民经济发展阶段学说,对里昂惕夫之谜作出新的理论解释。     

Note

Functional classes of Lorenz curves are derived from a generalization of a relative poverty notion. All these Lorenz curves compare individual income to the average of all larger or all smaller incomes. The parameters of the Lorenz curves are effectively computed from empirical income data by least square regressions. Best fits are analyzed and resulting functional Gini indices are compared to empirical Gini indices.First version received: September 2002/Final version received: April 2003     

Maximal asymptotic power and efficiency of two-sample tests based on generalized U-Statistics

In this article a systematic study is given of the asymptotic behavior of two-sample tests based on U-Statistics with arbitrary antisymmetric kernels . Besides the investigation under the hypothesis and under fixed alternatives we determine the local power as a function of as well as its maximizing value _opt. Moreover formulas for the asymptotic relative efficiency ARE(₂,₁) of the ₂-test with respect to the ₁-test are derived. It turns out that _opt also yields the most efficient test in the sense that ARE(_opt,)1 for all (admissible) kernels .     

Rank tests for testing randomness of a regression coefficient in a linear regression model

We propose a class of nonparametric tests for testing non-stochasticity of the regression parameterβ in the regression modely _i =βx _i +ɛ _i ,i=1, ...,n. We prove that the test statistics are asymptotically normally distributed both underH ₀ and under contiguous alternatives. The asymptotic relative efficiencies (in the Pitman sense) with respect to the best parametric test have also been computed and they are quite high. Some simulation studies are carried out to illustrate the results. Research was supported by the University Grants Commission, India.     

软测量在腈纶聚合质量指标控制中的应用

用混合模型技术，建立聚合反应过程质量指标的软测量模型，对现场检测数据进行深层加工处理和应用软测量技术开发工程应用软件，对工艺质量指标实时检测和显示，充分利用DCS系统和上位机软件的功能优势，解决工业实际问题。实验证明所开发的软测量模型精度满足了工程要求，与人工分析值比较，相对误差≤2．5％，完全能够满足工艺生产控制要求的。     

The Relative Effects of Relationship Quality and Exchange Satisfaction on Customer Loyalty

ABSTRACT

This paper addresses two key questions on how supplier firms can better manage industrial buyers to create higher loyalty. The first involves whether to focus on relationship quality or exchange satisfaction. This dual route model towards enhancing loyalty in essence is concerned with comparing the relative strengths of the effect from relationship quality to loyalty and from exchange satisfaction to loyalty. The second point of interest pertains to whether the effects from relationship quality and exchange satisfaction to loyalty are moderated by environmental conditions such as switching barriers and viable alternatives. Using data on business customers' ratings of a major information technology provider, we find that the effect of exchange satisfaction on loyalty is significantly greater than the effect of relationship quality on loyalty. We also find that the impact of exchange satisfaction on loyalty is less sensitive and more stable across different levels of switching barriers and viable alternatives. Conversely, the effect of relationship quality on loyalty is more pronounced to such moderating variables in that the effect of relationship quality on loyalty was greater when switching barriers were low and many viable alternatives existed. Implications for marketing theory and practice are discussed.