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311.
Abstract

In environmental monitoring and assessment, the main focus is to achieve observational economy and to collect data with unbiased, efficient and cost-effective sampling methods. Ranked set sampling (RSS) is one traditional method that is mostly used for accomplishing observational economy. In this article, we propose an unbiased sampling scheme, named paired double RSS (PDRSS) for estimating the population mean. We study the performance of the mean estimators under PDRSS based on perfect and imperfect rankings. It is shown that, for perfect ranking, the variance of the mean estimator under PDRSS is always less than the variance of mean estimator based on simple random sampling, paired RSS and RSS. The mean estimators under RSS, median RSS, PDRSS, and double RSS are also compared with the regression estimator of population mean based on SRS. The procedure is also illustrated with a case study using a real data set.  相似文献   
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313.
The paper begins with a brief illustration of the problems related to the protection of rights and constitutionalism in the context of European integration. The present-day challenges to European constitutionalism and the protection of rights through an analysis of the sources of law, the concepts of Constitution and sovereignty are then examined. The paper then points out the circularity that exists between State and Community legal systems and the dualism between the various bodies of guarantee. Finally it underlines how fundamental rights and the protection of those rights should operate as an element of intersection and consolidation between the two levels: in particular, on one hand, as a guarantee of harmonisation of the Community's social tissue and, on the other, as a guarantee for the different identities that exist therein  相似文献   
314.
Using the American Housing Survey for 2001 and Census 2000, I examine the link between gated communities and residential segregation. I hypothesize that gating and segregation are defined by similar mechanisms, thus reinforcing urban inequality in U.S. cities. The results, however, indicate a more complex relationship. On the one hand, there are common mechanisms behind the two processes: the pursuit of higher property values, fear of crime, and fear of increased social heterogeneity. An increase in percent recent immigrants leads to higher levels of both segregation and gating. On the other hand, factors such as region, percent black, percent Hispanic, percent college graduates, and functional specialization affect the two processes differentially. Although segregation is less pronounced and declining in the U.S. urban Southwest, gated communities are much more prominent there. The results challenge the notion that the declines in residential segregation in recent decades indicate social progress.  相似文献   
315.
The formulas and data used for 13 federal programs that allocate funds to state and local areas are described. Suggestions for types of formulas and data appropriate for allocation of funds are made. Some recommendations in the Report on Statistics for Allocation of Funds published by the Office of Federal Statistical Policy and Standards are discussed. The possible effects of the formulas and data used in the allocation of funds for federal programs are examined in the light of the recommendations given in the report.  相似文献   
316.
A robust test for the one-way ANOVA model under heteroscedasticity is developed in this paper. The data are assumed to be symmetrically distributed, apart from some outliers, although the assumption of normality may be violated. The test statistic to be used is a weighted sum of squares similar to the Welch [1951. On the comparison of several mean values: an alternative approach. Biometrika 38, 330-336.] test statistic, but any of a variety of robust measures of location and scale for the populations of interest may be used instead of the usual mean and standard deviation. Under the commonly occurring condition that the robust measures of location and scale are asymptotically normal, we derive approximations to the distribution of the test statistic under the null hypothesis and to its distribution under alternative hypotheses. An expression for relative efficiency is derived, thus allowing comparison of the efficiency of the test as a function of the choice of the location and scale estimators used in the test statistic. As an illustration of the theory presented here, we apply it to three commonly used robust location–scale estimator pairs: the trimmed mean with the Winsorized standard deviation; the Huber Proposal 2 estimator pair; and the Hampel robust location estimator with the median absolute deviation.  相似文献   
317.
The paper analyses the biasing effect of anonymising micro data by multiplicative stochastic noise on the within estimation of a linear panel model. In short panels, additional bias results from serially correlated regressors. Results in this paper are related to the project “Firms’ Panel Data and Factual Anonymisation,” which is financed by Federal Ministry of Education and Research. We would like to thank the anonymous referees for helpful comments.  相似文献   
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Journal of Nonverbal Behavior - There are individual differences between people in their production of representational gestures, hand movements that represent the referent. In the present study,...  相似文献   
320.
This article develops the theoretical framework needed to study the multinomial regression model for complex sample design with pseudo-minimum phi-divergence estimators. The numerical example and the simulation study propose new estimators for the parameter of the logistic regression with overdispersed multinomial distributions for the response variables, the pseudo-minimum Cressie–Read divergence estimators, as well as new estimators for the intra-cluster correlation coefficient. The simulation study shows that the Binder’s method for the intra-cluster correlation coefficient exhibits an excellent performance when the pseudo-minimum Cressie–Read divergence estimator, with \(\lambda =\frac{2}{3}\), is plugged.  相似文献   
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