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A weighted multivariate signed-rank test for cluster-correlated data

Haataja, Riina; Larocque, Denis; Nevalainen, Jaakko; … - In: Journal of Multivariate Analysis 100 (2009) 6, pp. 1107-1119

A weighted multivariate signed-rank test is introduced for an analysis of multivariate clustered data. Observations in different clusters may then get different weights. The test provides a robust and efficient alternative to normal theory based methods. Asymptotic theory is developed to find...

Persistent link: https://www.econbiz.de/10005153071

Signed-rank tests for location in the symmetric independent component model

Nordhausen, Klaus; Oja, Hannu; Paindaveine, Davy - In: Journal of Multivariate Analysis 100 (2009) 5, pp. 821-834

The so-called independent component (IC) model states that the observed p-vectorX is generated via X=[Lambda]Z+[mu], where [mu] is a p-vector, [Lambda] is a full-rank matrix, and the centered random vector Z has independent marginals. We consider the problem of testing the null hypothesis on the...

Persistent link: https://www.econbiz.de/10005006423

Analysis of correlated binary data under partially linear single-index logistic models

Yi, Grace Y.; He, Wenqing; Liang, Hua - In: Journal of Multivariate Analysis 100 (2009) 2, pp. 278-290

Clustered data arise commonly in practice and it is often of interest to estimate the mean response parameters as well as the association parameters. However, most research has been directed to address the mean response parameters with the association parameters relegated to a nuisance role....

Persistent link: https://www.econbiz.de/10005221548

The Parental Perspective over the Use of iPads in Primary and Middle Years of Schooling: Issues for Pedagogical and Policy Debates

Ismail, Abdullah; Cashin, Anthony - In: International Journal of Web-Based Learning and … 12 (2017) 3, pp. 34-46

Apple's iPad and other forms of tablet are reportedly gaining increasing popularity within the academic premises. Most of the published research on this topic has highly admired the positive role and impact of iPads on teaching and learning practices, as if an exogenous technological induction...

Persistent link: https://www.econbiz.de/10012048657

Primary elections in the United States

Hirano, Shigeo - 2019

The direct primary stands as one of the most significant and distinctive political reforms of the Progressive era in …' preferences. They begin by studying whether primary elections have achieved the goals set by progressive reformers when they were …. Anyone interested in US primary elections, US political history, or electoral institutions more generally should read this …

Persistent link: https://www.econbiz.de/10013285389

Title Nau: the impact of Title IX on women's education in the U.S. and what it means for India

Adams, Taylor; Zhang, Zihe; Holmes, Rebecca; Shah, Pratik - In: The review of black political economy 43 (2016) 2, pp. 193-207

Persistent link: https://www.econbiz.de/10011671356

Asymptotic results in segmented multiple regression

Kim, Jeankyung; Kim, Hyune-Ju - In: Journal of Multivariate Analysis 99 (2008) 9, pp. 2016-2038

This paper studies the asymptotic behavior of the least squares estimators in segmented multiple regression. For a model with more than one partitioning variable, each of which has one or more change-points, we study the asymptotic properties of the estimated change-points and regression...

Persistent link: https://www.econbiz.de/10005199628

The noncentral Wishart as an exponential family, and its moments

Letac, Gérard; Massam, Hélène - In: Journal of Multivariate Analysis 99 (2008) 7, pp. 1393-1417

While the noncentral Wishart distribution is generally introduced as the distribution of the random symmetric matrix where Y1,...,Yn are independent Gaussian rows in with the same covariance, the present paper starts from a slightly more general definition, following the extension of the...

Persistent link: https://www.econbiz.de/10005199635

Robust parameter estimation with a small bias against heavy contamination

Fujisawa, Hironori; Eguchi, Shinto - In: Journal of Multivariate Analysis 99 (2008) 9, pp. 2053-2081

In this paper we consider robust parameter estimation based on a certain cross entropy and divergence. The robust estimate is defined as the minimizer of the empirically estimated cross entropy. It is shown that the robust estimate can be regarded as a kind of projection from the viewpoint of a...

Persistent link: https://www.econbiz.de/10005199754

A unified and generalized set of shrinkage bounds on minimax Stein estimates

Fourdrinier, Dominique; Strawderman, William E. - In: Journal of Multivariate Analysis 99 (2008) 10, pp. 2221-2233

Consider the problem of estimating the mean vector [theta] of a random variable X in , with a spherically symmetric density f(||x-[theta]||2), under loss ||[delta]-[theta]||2. We give an increasing sequence of bounds on the shrinkage constant of Stein-type estimators depending on properties of...

Persistent link: https://www.econbiz.de/10005199793

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