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91.
李沛 《湖南大学学报(社会科学版)》2012,26(3):62-67
利用2009～2010年针对长株潭三地比较大型的展览会进行现场调研所得的3101份参展观众问卷数据,通过建立有序Probit模型,考察了参展观众个人特征、展会特征及其效应等三个方面的10个变量对参展观众展会满意度的影响。研究结果发现,湖南省展览会目前的参展观众满意度仍然存在较大的提升空间,展览会的组织工作情况、展览会参展商的质量、参展观众参展达到预期目标的程度和展览会参展商的数量是影响参展观众对展览会总体评价的核心所在。根据上述结论,本文提出了提高会展满意度的相关政策建议。 相似文献
92.
The estimation of the reliability function of the Weibull lifetime model is considered in the presence of uncertain prior information (not in the form of prior distribution) on the parameter of interest. This information is assumed to be available in some sort of a realistic conjecture. In this article, we focus on how to combine sample and non-sample information together in order to achieve improved estimation performance. Three classes of point estimatiors, namely, the unrestricted estimator, the shrinkage estimator and shrinkage preliminary test estimator (SPTE) are proposed. Their asymptotic biases and mean-squared errors are derived and compared. The relative dominance picture of the estimators is presented. Interestingly, the proposed SPTE dominates the unrestricted estimator in a range that is wider than that of the usual preliminary test estimator. A small-scale simulation experiment is used to examine the small sample properties of the proposed estimators. Our simulation investigations have provided strong evidence that corroborates with asymptotic theory. The suggested estimation methods are applied to a published data set to illustrate the performance of the estimators in a real-life situation. 相似文献
93.
In this paper, we consider some results on distribution theory of multivariate progressively Type‐II censored order statistics. We also establish some characterizations of Freund's bivariate exponential distribution based on the lack of memory property. 相似文献
94.
Walter Sosa-Escudero 《统计学通讯:理论与方法》2013,42(14):2601-2616
This article proposes new simple testing procedures for the joint null hypothesis of absence of persistent effects, in the form of random effects and first-order serial correlation in the error component model. The fact that the presence of random effects is clearly of a one-sided nature, together with the fact that in many empirical applications researchers worry about positive serial correlation leaves room for a power gain that arises from restricting the parameter space under the alternative hypothesis, compared to existing procedures that allow for two-sided alternatives. A Monte Carlo experiment shows that the proposed statistics have good size and power performance in very small samples like those typically used in applied work in panel data. An empirical example illustrates the usefulness of the proposed statistics. 相似文献
95.
96.
This article deals with the locally most powerful rank tests for testing the hypothesis that two failure rates are equal against the alternative that one failure rate is greater than the other, when the combined ordered sample is multiple Type-II censored. A modified version of the Dupa? and Hájek (1969) theorem is used to establish their asymptotic normality under fixed alternative since the scores generating functions associated with these rank test statistics have a finite number of jump discontinuities. The modified version that leads to a simpler centering constant, is proved by Dupa? (1970) using the results of Hájek (1968). The Pitman AREs of these rank tests based on censored data relative to the corresponding tests based on complete data are obtained under some Lehmann-type alternative distributions such that their failure rates dominate the failure rates of the respective null distributions. The AREs are computed numerically for single (left or right) and double censored data, and the extent of loss due to these censoring schemes is discussed. The rank tests considered here include among them the Mann-Whiney-Wilcoxon (MWW) test, the Savage test, and the linear combination of these two tests. In the case of all the tests, except the MWW test, it is found that the loss of efficiency due to left censoring is considerably less than that due to right censoring. In the case of finite samples, Monte Carlo simulation results showing the empirical levels and empirical powers against some Lehmann alternatives are presented. 相似文献
97.
ABSTRACTThe Mack–Wolfe test is the most frequently used non parametric procedure for the umbrella alternative problem. In this paper, modifications of the Mack–Wolfe test are proposed for both known peak and unknown peak umbrellas. The exact mean and variance of the proposed tests in the null hypothesis are also derived. We compare these tests with some of the existing tests in terms of the type I error rate and power. In addition, a real data example is presented. 相似文献
98.
研究了富足p序半群的结构,给出了这类序半群结构定理.定义了右弱完全右p序半群.研究了这种序半群的重要性质,并给出这种序半群的结构分解定理. 相似文献
99.
以经典的中位选民模型为理论基础,利用全国“十县百村”新农村建设调查的1 981户农户数据,运用有序logit计量模型,对农户公共品需求的影响因素进行了实证分析。结果显示：收入对农业生产设施、农村道路和社会保障的需求偏好存在显著正向影响,说明农户的公共品需求具有明显的收入效应;其次,农户对农业生产设施和社会保障的需求具有明显的价格效应;另外,其他个人特征和村庄特征等因素也会影响农户公共品需求。 相似文献
100.
进入“新常态”阶段,中国经济发展增长速度放缓,结构性问题逐步凸显。“大众创业、万众创新”号召的提出,为进一步缓解结构性矛盾提供了因应之道。采用中国家庭金融调查（CHFS）数据,验证了创业与居民幸福感的相关性,并进一步进行了实证检验。研究发现,创业与居民的幸福感正相关;居民幸福感可随着创业参与水平的提高而不断增加;持平或盈利的创业项目可以提升居民幸福感,盈利水平与居民幸福感提升水平正相关。因此,应抓住“双创”的机遇,合理利用各项优惠政策和措施,同时提升人力资本,强化创业培训,提高创业成功的概率,进而提升居民幸福感。 相似文献