Trade-off between quoted lead time and price

In a make-to-order environment, lead time and price can play a crucial role in determining the financial success of a firm. Their importance increases when demand is sensitive to the quoted lead time and price. A model is presented which uses the quoted lead time and price as a mechanism to determine the optimal demand level. The relationships between the model parameters and their impacts on the firm's profit is also analysed. In addition, the effect of the number of job requests, and the mean processing time are examined. Based on the results presented in this paper, there is clear indication that the firm's profit is sensitive to the inventory holding rate, and that the inventory holding cost component is redundant in the presence of a tardiness cost component.     

The robustness of the systemwise breusch-godfrey autocorrelation test for non-normal distributed error terms

Using Monte Carlo methods, the properties of systemwise generalisations of the Breusch-Godfrey test for autocorrelated errors are studied in situations when the error terms follow either normal or non-normal distributions, and when these errors follow either AR(1) or MA(1) processes. Edgerton and Shukur (1999) studied the properties of the test using normally distributed error terms and when these errors follow an AR(1) process. When the errors follow a non-normal distribution, the performances of the tests deteriorate especially when the tails are very heavy. The performances of the tests become better (as in the case when the errors are generated by the normal distribution) when the errors are less heavy tailed.     

Diagnostics for elliptical linear mixed models with first-order autoregressive errors

For longitudinal time series data, linear mixed models that contain both random effects across individuals and first-order autoregressive errors within individuals may be appropriate. Some statistical diagnostics based on the models under a proposed elliptical error structure are developed in this work. It is well known that the class of elliptical distributions offers a more flexible framework for modelling since it contains both light- and heavy-tailed distributions. Iterative procedures for the maximum-likelihood estimates of the model parameters are presented. Score tests for the presence of autocorrelation and the homogeneity of autocorrelation coefficients among individuals are constructed. The properties of test statistics are investigated through Monte Carlo simulations. The local influence method for the models is also given. The analysed results of a real data set illustrate the values of the models and diagnostic statistics.     

Consumer bankruptcy and default: The role of individual social capital

In this paper, we empirically assess the role of individual social capital on personal bankruptcy and default outcomes in the consumer credit market. After controlling for a borrower’s risk score, debt, income, wealth, and legal and economic environments, we find that default/bankruptcy risk rises and then falls over the lifecycle, while a borrower who owns a home or is married has a lower risk of default/bankruptcy. Moreover, a borrower who migrates 190 miles from his “state of birth” is 17% more likely to default and 15% more likely to file for bankruptcy, while a borrower who continues to live in his state of birth is 14% and 10% less likely to default and file for bankruptcy, respectively. A borrower who moves to a rural area is 9% and 7% less likely to default and declare bankruptcy, respectively. We also find that measures of social networks, norms, and cooperation and trust (i.e., aggregate social capital) are inversely related to consumer bankruptcy.     

加强和改进思想政治工作

思想政治工作是我们党的一大优势。认真探索在新形势下加强和改进党的思想政治工作 ,是摆在我们面前的一项十分重要的任务。新时期加强和改进党的思想政治工作 ,必须坚持江泽民同志“七一”讲话的精神 ;坚持把继承性与创新性、系统性与开放性、全局性与重点性、前瞻性与现实性等方面有机地结合起来 ,思想政治工作才能具有更多的主动性和方向性     

光度法同时测定磷和硅的研究

用钼蓝法分别测定磷和硅的含量多有报导［１］［２］［３］，但用该法对其进行同时测定未见报导．本文探讨了用钼蓝法同时测定磷和硅，确定了其测定条件．本法具有简便、快速、不需特殊试剂等特点，可用于水等试样中磷和硅的同时测定．     

The Transport System and Society’s Metabolism in the UK

This paper analyses the interrelation between the transport system and measures of resource consumption such as material and energy consumption over a 60-year period (1937–1997) in the UK. Non-motorized transport and time consumption for mobility are estimated in addition to conventional measures of transport. During the period analyzed, the UK population grew by 20% while transport of goods and persons increased more than threefold and material and energy consumption almost doubled. The transport intensity of domestic material input (DMI) doubled to 300 ton-kilometers (tkm) per ton of DMI while the transport intensity of domestic energy consumption (DEC) doubled to 20 tkm per gigajoule (GJ) of DEC. Thus, while the material and energy intensity of GDP declined significantly, a well-established trend in many advanced countries, the transport intensity of materials and energy consumption rose. These findings suggest a close link between transport, economic development, and long-term structural transformations. In the case of personal transport, a rebound effect was also observed: whereas the average speed of transport has greatly increased, the average number of hours per day devoted to personal transport has not declined.     

灰色动态预测模型在货币供应量预测中的应用

在对金融系统中货币供应量的预测进行相关研究的基础上,介绍了符合金融系统预测规律的灰色系统动态预测法,并根据中国货币供应量的实际数据进行了实证的预测检验。结果显示,这种方法简单,不需要借助于其他任何时间序列数据,需要数据量少,预测精确度高,对于近期预测尤其准确,也可进行中长期预测;实证预测结果也符合我国金融系统中货币供应量预测的实际。     

东亚区域经济合作的约束条件及主导力量——“10＋1”合作模式可行性研究

在全球各区域经济合作中,东亚区域经济合作处于制度推进的初级阶段。在东亚合作约束条件序列中,经济整合度和贸易开放约束较小,主导国和主导力量约束次之,政治和文化约束最大。与欧洲和北美区域经济合作不同,东亚文化背景殊异;百年殖民历史伤痛犹新;放弃国家主权疑虑重重,还没有形成能够协调各方利益和促进区域经济合作的稳定制度机制。在内部和外部条件限制下,东亚经济一体化只能通过三个相互割裂的“东盟10 l”机制“迂回”推进,而且在相当长时期合作采取的是自由贸易区方式。     

按"七一"讲话精神加强和改进党的建设

江泽民同志"三个代表"的重要思想,特别是在庆祝建党80周年大会上的重要讲话,为党的建设提出了明确的目标和要求.迎接党的十六大,就要按照这些要求,把党的建设的各项任务真正落到实处.要采取有效措施,加强和改进党的思想理论建设、政治建设、组织建设、作风建设和制度建设.要深入研究党的执政规律和执政方式、党的阶级基础和社会基础、党内民主建设、劳动和劳动价值等问题,力求作出深入、科学的回答.