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排序方式: 共有468条查询结果,搜索用时 31 毫秒
91.
Philip Hans Franses 《Econometric Reviews》1995,14(2):183-193
This paper proposes and applies a test procedure for misspecification in a dynamic regression model with moving average errors. The test statistics are based on testing for unit roots in the moving average process when the model is deliberately overdifferenced. 相似文献
92.
Hans Van de Velde Roeland van Hout & Marinel Gerritsen 《Journal of Sociolinguistics》1997,1(3):361-391
The study investigates phonological variation and change in two varieties of standard Dutch: southern standard Dutch (spoken in Flanders, the northern part of Belgium) and northern standard Dutch (spoken in the Netherlands). A new source for studying language change in progress is introduced: archived recordings of radio broadcasts. The study covers the period from 1935 to 1993. Changes in progress are studied by a combination of insight and techniques from historical linguistics and sociolinguistics. The outcomes of analyzing separate linguistic variables are presented, but the focus of the analysis is on the presence of more general patterns of covariation within the set of linguistic variables and on the possibility of distinguishing (prototypical) temporal and community-based varieties of standard Dutch. The results reveal a pattern of divergence between the two varieties of standard Dutch. The southern variety remained more or less stable between 1935 and 1993. Northern standard Dutch, however, changed substantially. 相似文献
93.
Michael S. Lane Dietrich L. Schaupp Hans Pohl 《International Journal of Value-Based Management》1991,4(2):77-93
This study presents the results of a survey of graduate students from three cultural backgrounds. English, German, and American business students responded to an eleven-item survey designed to assess one's beliefs about what is necessary to succeed in graduate business programs. The results indicate that the attributes which students believe are required to succeed differ among cultures, with the greatest differences occurring between the American and European respondents. 相似文献
94.
In this paper a model for negotiation support in tactical procurement planning is designed, which is based on a real planning problem from the liquid gas trade sector. The problem is modeled as an assignment problem and transformed into a robust form. Computational experiments using data from a practice partner are presented to demonstrate the effective decision support of our approach. 相似文献
95.
96.
Nuclear Waste Management under Approaching Disaster: A Comparison of Decommissioning Strategies for the German Repository Asse II 下载免费PDF全文
This article compares different strategies for handling low‐ and medium‐level nuclear waste buried in a retired potassium mine in Germany (Asse II) that faces significant risk of uncontrollable brine intrusion and, hence, long‐term groundwater contamination. We survey the policy process that has resulted in the identification of three possible so‐called decommissioning options: complete backfilling, relocation of the waste to deeper levels in the mine, and retrieval. The selection of a decommissioning strategy must compare expected investment costs with expected social damage costs (economic, environmental, and health damage costs) caused by flooding and subsequent groundwater contamination. We apply a cost minimization approach that accounts for the uncertainty regarding the stability of the rock formation and the risk of an uncontrollable brine intrusion. Since economic and health impacts stretch out into the far future, we examine the impact of different discounting methods and rates. Due to parameter uncertainty, we conduct a sensitivity analysis concerning key assumptions. We find that retrieval, the currently preferred option by policymakers, has the lowest expected social damage costs for low discount rates. However, this advantage is overcompensated by higher expected investment costs. Considering all costs, backfilling is the best option for all discounting scenarios considered. 相似文献
97.
Stochastic frontier models are widely used to measure, e.g., technical efficiencies of firms. The classical stochastic frontier model often suffers from the empirical artefact that the residuals of the production function may have a positive skewness, whereas a negative one is expected under the model, which leads to estimated full efficiencies of all firms. We propose a new approach to the problem by generalizing the distribution used for the inefficiency variable. This generalized stochastic frontier model allows the sample data to have the wrong skewness while estimating well-defined and nondegenerate efficiency measures. We discuss the statistical properties of the model, and we discuss a test for the symmetry of the error term (no inefficiency). We provide a simulation study to show that our model delivers estimators of efficiency with smaller bias than those of the classical model even if the population skewness has the correct sign. Finally, we apply the model to data of the U.S. textile industry for 1958–2005 and show that for a number of years our model suggests technical efficiencies well below the frontier while the classical one estimates no inefficiency in those years. 相似文献
98.
Abstract In this article an update of the Rota-Risk-Profile-Analysis (RRPA) is presented. This RRPA is based on 9 rota-risk criteria that are central to a more encompassing rota theory. The RRPA allows coherent assessment of the physical and social risks of a working-time schedule (rota). comparison of schedules with one another in quantitative terms and interpretations of possible differential effects more adequately. First, a closer look at the instrument-a computer program-is taken. Afterwards the criteria and their way of implementation are discussed briefly. To get an impression of the way that RRPA functions an example will be given by applying the instrument to the working rotas from a study on shiftwork in the Netherlands. 相似文献
99.
Hans van Ophem 《商业与经济统计学杂志》2013,31(4):503-511
This article presents a method for modeling endogenous selectivity in count data. As in the case of the switching-regression model, two regimes are distinguished with potentially different data-generating processes. The regime choice is allowed to be correlated with the observed count in each of the regimes. An estimable model is obtained by transforming the underlying processes to the bivariate normal distribution. An empirical application on trip count is provided. 相似文献
100.
汉斯·J·施奈德 《复旦学报(社会科学版)》2010,(4)
哈贝马斯主张,为使宗教进入公共领域,必须对它们的文本进行分类和翻译,从而把它们的命题含义与它们的神圣外衣加以分离,以便使它们的意义成为公众可理解的.作者以后期维特根斯坦的哲学为基础进行论证,认为宗教语言不同于科学语言,因为它们涉及不同的生活形式、处理不同的主题,宗教所关心的是对作为整体的世界的生活态度,而科学则对作为物的总和的世界加以说明,因而把宗教的话语翻译成命题的表达方式的做法既无必要也无助益. 相似文献