Panel LM unit root tests with level and trend shifts

This paper considers a Lagrange multiplier (LM) based panel unit root test that allows for heterogeneous structural breaks in both the intercepts and slopes of a series. We note that many popular time series variables are likely to exhibit changing means and/or trends over time. Given that the usual tests will depend on the nuisance parameters indicating the locations of the trend breaks, we adopt a transformation procedure that makes our new panel unit root tests invariant to the nuisance parameters. To illustrate the importance of the power gain provided by our test, we examine the convergence hypothesis using relative ratios of per capita health care expenditures in 20 OECD countries. Our results provide evidence that the convergence hypothesis is supported.     

PITFALLS IN CROSS‐SECTION STUDIES WITH INTEGRATED REGRESSORS: A SURVEY AND NEW DEVELOPMENTS

In cross‐section studies, if the dependent variable is I(0) but the regressor is I(1), the true slope must be zero in the resulting “unbalanced regression.” A spuriously significant relationship may be found in large cross‐sections, however, if the integrated regressor is related to a stationary variable that enters the DGP but is omitted from the regression. The solution is to search for the related stationary variable, in some cases the first difference of the integrated regressor, in other cases, a categorical variable that can take on limited number of values which depend on the integrated variable. We present an extensive survey, new developments, and applications particularly in finance.     

An objective Bayesian analysis of common stochastic trends in international stock prices and exchange rates

This paper uses Bayesian methods to analyze unit root and cointegration properties of two different finance data sets. Avoiding the use of subjective prior information, the paper surveys and utilizes several different objective Bayesian methodologies in an investigation of common stochastic trends in international stock markets and in spot and forward exchange rates for several different countries.     

抽油机V带执行标准现状及有关问题探讨

阐述了国内外V带现行标准状况，指出通用V带标准应用于抽油机V带存在的问题。针对抽油机用V带寿命不足5000h的问题，提出制定符合中国油田实际的《抽油机用V带》新标准，并从五个方面提出了编写新标准的建议。     

加强地勘单位领导班子自身建设初探

文章认为,要建设一个优秀的地勘单位领导班子,应努力做好思想政治及组织建设工作,正确处理民主与集中、集体与个人、局部与全局等方面的关系。     

小学体育新课标目标统领下单元教学计划的研究

新的全日制义务教育《体育(1至6年级)课程标准,》对体育课提出了运动参与、运动技能、身体健康、心理健康和社会适应等五大领域的教学目标。文章通过实验,在对比中阐述了以新课程标准为教学目标,进行有针对性的教学设计和课堂实施,可使学生各方面的发展更符合新时期的要求的观点,并提出了单元教学计划设计的方法。     

物流中的新设施—自动化立体仓库

当今物流速度日益加快，仓库建设和改造向空间、立体化、自动化快速发展，建设自动化立体仓库是今后的必然趋势。结合多年实践．对物流领域成件货物储存的新设施，自动化立体仓库进行了详细阐述。     

效率工资的决定机理及在薪酬管理中的作用

效率工资理论认为 ,支付比市场工资更高的工资 ,劳动总成本可能更小 ,企业能获得更多的利润。工作转换模型表明 ,在其他条件不变时 ,企业支付较高的工资可以降低工人的工作转换率。效率工资理论在理论上和现实的薪酬管理中都展示了极其强大的威力。     

协整在产业组织学中的应用

首先从协整的原理着手,结合产业组织学学科特点,分析了协整在产业组织学中的可用性。随后利用协整理论分析了LydiaPinkam公司的数据,给出了一个产业组织命题的经验证据,用实例说明将协整应用于产业组织学领域是一种有益的尝试。