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111.
吴晨映 《河南教育学院学报(哲学社会科学版)》2006,25(1):119-122
减税是世界各国促进经济稳定增长的重要手段。总结与借鉴国外几十年来减税实践的经验与教训,理性分析我国当前经济运行走势及减税可行性,充分发挥税收政策在启动有效需求、改善有效供给中的作用,是十分必要和有益的。 相似文献
112.
Jeffrey M. Albert Anant M. Kshirsagar 《Australian & New Zealand Journal of Statistics》1993,35(3):345-357
This paper presents a method of discriminant analysis especially suited to longitudinal data. The approach is in the spirit of canonical variate analysis (CVA) and is similarly intended to reduce the dimensionality of multivariate data while retaining information about group differences. A drawback of CVA is that it does not take advantage of special structures that may be anticipated in certain types of data. For longitudinal data, it is often appropriate to specify a growth curve structure (as given, for example, in the model of Potthoff & Roy, 1964). The present paper focuses on this growth curve structure, utilizing it in a model-based approach to discriminant analysis. For this purpose the paper presents an extension of the reduced-rank regression model, referred to as the reduced-rank growth curve (RRGC) model. It estimates discriminant functions via maximum likelihood and gives a procedure for determining dimensionality. This methodology is exploratory only, and is illustrated by a well-known dataset from Grizzle & Allen (1969). 相似文献
113.
郭艳红 《河北科技师范学院学报(社会科学版)》2005,4(1):75-77
王蒙小说是一种生活化小说,他的小说创作,既看重"艺术直觉"、艺术联想,同时又强调生活,这是王蒙小说生成的前提,这种小说生成的思维方式又影响了他的文本形式,也促成了王蒙小说文体的多样化,从而使其小说从文本形式到精神内质都向生活全面开放. 相似文献
114.
说到“新批评派”的成员构成,国内外学界有许多不同理解.这些认识,虽不乏真知灼见,但也不乏随意甚至混乱之嫌.为进一步推进国内“新批评”研究,文章提出,“新批评派”本身复杂丰富,须分人、分层、分国籍考察;对“新批评派”成员的译介须统一译名,避免混淆而用全称;祛除对“新批评派”单质化和标签化理解,还原其丰富性和复杂性. 相似文献
115.
Miklós ANTAL Benedikt LEHMANN Thiago GUIMARAES Alexandra HALMOS Bence LUKÁCS 《International labour review / International Labour Office》2024,163(1):25-47
Changes in working time have important economic, social and environmental implications. However, research on workers' preferences is highly fragmented across disciplines and journals. To overcome this, the present article provides a systematic review of the literature, analysing 173 studies. The study shows that working-time outcomes and mismatches are mostly studied in a small group of OECD countries, using survey data and statistical methods. The most clear and consistent results are about gender, care responsibilities and current working hours. Among professions, only the medical workforce receives substantial attention. Norms and preference formation are poorly understood, and more qualitative research is essential to understand how working-time reductions could spread. 相似文献
116.
证券存托凭证(DR)的推行对于创新投资渠道,扩大融资空间,促进证券市场渐进发展有着重要的作用.但是发行CDR(中国证券存托凭证)是国内资本市场开放的一项系统工程,牵涉到法律、银行服务、金融监管等方方面面的问题.考察国外证券市场的成熟经验,以严格监管为特色的ADR(Ⅲ级别)作为CDR的发行模式比较适合中国的目前证券市场发展的现状.由于证券存托凭证作为一种金融衍生工具,在法律上缺乏明确的法律关系定位,特别是与现行的证券法律体系存在诸多制度矛盾与障碍,上述种种问题都急需通过后续的证券法修改来加以完善. 相似文献
117.
Heng-Hui Lue 《统计学通讯:理论与方法》2013,42(20):3276-3286
We consider a nonlinear censored regression problem with a vector of predictors. With censoring, high-dimensional regression analysis becomes much more complicated. Since censoring can cause severe bias in estimation, modification to adjust such bias is needed to be made. Based on the weight adjustment, we develop the modification of sliced average variance estimation for estimating the lifetime central subspace without requiring a prespecified parametric model. Our proposed method preserves as much regression information as possible. Simulation results are reported and comparisons are made with the sliced inverse regression of Li et al. (1999). 相似文献
118.
The Lomax (Pareto II) distribution has found wide application in a variety of fields. We analyze the second-order bias of the maximum likelihood estimators of its parameters for finite sample sizes, and show that this bias is positive. We derive an analytic bias correction which reduces the percentage bias of these estimators by one or two orders of magnitude, while simultaneously reducing relative mean squared error. Our simulations show that this performance is very similar to that of a parametric bootstrap correction based on a linear bias function. Three examples with actual data illustrate the application of our bias correction. 相似文献
119.
Ryan T. Godwin 《统计学通讯:理论与方法》2013,42(7):1887-1901
ABSTRACTWe derive an analytic expression for the bias of the maximum likelihood estimator of the parameter in a doubly-truncated Poisson distribution, which proves highly effective as a means of bias correction. For smaller sample sizes, our method outperforms the alternative of bias correction via the parametric bootstrap. Bias is of little concern in the positive Poisson distribution, the most common form of truncation in the applied literature. Bias appears to be the most severe in the doubly-truncated Poisson distribution, when the mean of the distribution is close to the right (upper) truncation. 相似文献
120.
《统计学通讯:理论与方法》2013,42(8-9):1951-1962
In this paper we consider two strategies for variation reduction. One of them is the exploitation of interactions. We also discuss the role of experiments in discovering interactions and in particular the use of robust designs to obtain the interaction between control and noise factors. Then we attempt to reduce the variation in a measurement system using a robust design. 相似文献