On the conservative simultaneous confidence procedures for multiple comparisons among mean vectors

In this paper, conservative simultaneous confidence intervals for multiple comparisons among mean vectors in multivariate normal distributions are considered. Some properties of the multivariate Tukey–Kramer procedure for pairwise comparisons and the conservative simultaneous confidence procedure for comparisons with a control are presented. Particularly, the upper bound for the conservativeness of the simultaneous confidence procedure for comparisons with a control is obtained. Finally, numerical results by Monte Carlo simulations and an example to illustrate the procedure are given.     

Inference for the two-parameter half-logistic distribution using pivotal quantities under progressively Type-II censoring schemes

This article addresses estimation and prediction problems for the two-parameter half-logistic distribution based on pivotal quantities when a sample is available from the progressively Type-II censoring scheme. An unbiased estimator of the location parameter based on a pivotal quantity is derived. To estimate the scale parameter, a new method based on a pivotal quantity is proposed. The proposed method provides a simpler estimation equation than the maximum likelihood equation. In addition, confidence intervals for the location and scale parameters are derived from these pivotal quantities. In the prediction of censored failure times, the shortest-length predictive intervals for the censored failure times are derived using a pivotal quantity. Finally, the validity of the proposed method is assessed through Monte Carlo simulations and a real data set is presented for illustration purposes.     

Ambiguity and Second‐Order Belief

Anscombe and Aumann (1963) wrote a classic characterization of subjective expected utility theory. This paper employs the same domain for preference and a closely related (but weaker) set of axioms to characterize preferences that use second‐order beliefs (beliefs over probability measures). Such preferences are of interest because they accommodate Ellsberg‐type behavior.     

Robust Bayesian analysis for exponential parameters under generalized Type-II progressive hybrid censoring

The Type-II progressive hybrid censoring scheme has received wide attention, but it has a disadvantage in that long time may be required to complete the life test. The generalized progressive Type-II hybrid censoring scheme has recently been proposed to solve this problem. Under the censoring scheme, the time on test does not exceed a predetermined time. In this paper, we propose a robust Bayesian approach based on a hierarchical structure when the generalized progressive Type-II hybrid censored sample has a two-parameter exponential distribution. For unknown parameters, marginal posterior distributions are provided in closed forms, and their statistical properties are discussed. To examine the robustness of the proposed method, Monte Carlo simulations are conducted and a real data set is analyzed. Further, the quality and adequacy of the proposed model are evaluated in an analysis based on the real data.     

SUR Approach for IV Estimation of Canonical Contagion Models

Seemingly unrelated regression (SUR) method is applied to the instrumental variable (IV) estimation of the canonical contagion models. A finite sample Monte Carlo experiment shows that the resulting estimator, IV-SUR estimator, is substantially better than the existing IV estimator in terms of both bias and mean squares error under diverse circumstance of instrument, conditional heteroscedasticity, and cross-section correlation.     

On Test Statistics in Profile Analysis with High-dimensional Data

We consider profile analysis with unequal covariance matrices under multivariate normality. In particular, we discuss this problem for high-dimensional data where the dimension is larger than the sample size. We propose three test statistics based on Bennett’s (1951) transformation and the Dempster trace criterion proposed by Dempster (1958 Dempster, A.P. (1958). A high dimensional two samples significance test. Annals of Mathematical Statistics 29:995–1010.[Crossref] , [Google Scholar]). We derive the null distributions as well as the nonnull distributions of the test statistics. Finally, in order to investigate the accuracy of the proposed statistics, we perform Monte Carlo simulations for some selected values of parameters.     

The interactive effect of leader–member exchange and electronic communication on employee psychological empowerment and work outcomes

We advance understanding of the role that leaders play in promoting psychological empowerment and positive work outcomes (job satisfaction, organizational commitment and job performance) for employees who engage in a high degree of electronic communication in their job. By integrating leader–member exchange (LMX) theory and theories of electronic communication, we build and test a mediated moderation model in which employees’ degree of electronic communication in their job amplifies the positive relationship that LMX has to psychological empowerment and subsequent employee work outcomes. Based on a sample of 353 early-career professionals employed in a range of different types of organizations, we found general support for the hypothesized model. We discuss the study’s theoretical and practical implications for leading employees in electronically-enabled work environments.     

Effects of Motivation on Charitable Giving Practices: The Case of Korean American Immigrants

This study empirically evaluates the effects of motivation for philanthropic giving on distinct charitable practices of immigrants, namely ethnic donation versus mainstream donation. The study pays special attention to three major types of motives: rational motives, normative motives, and civic duty. Based on the Korean-American Philanthropic Survey, the study constructs a bivariate probit regression model to assess the relationship between motivation and charitable practices. South Korean immigrants’ ethnic donation and their mainstream donation were explained by different types of motives: Normative motives represented the primary explanatory factor for ethnic donation, and civic duty motives represented the key factor for mainstream donation. However, rational motives were related to neither form of donation. There was a negative relationship between mainstream donation and ethnic donation.

     

An objective Bayesian analysis of the two-parameter half-logistic distribution based on progressively type-II censored samples

This paper develops an objective Bayesian analysis method for estimating unknown parameters of the half-logistic distribution when a sample is available from the progressively Type-II censoring scheme. Noninformative priors such as Jeffreys and reference priors are derived. In addition, derived priors are checked to determine whether they satisfy probability-matching criteria. The Metropolis–Hasting algorithm is applied to generate Markov chain Monte Carlo samples from these posterior density functions because marginal posterior density functions of each parameter cannot be expressed in an explicit form. Monte Carlo simulations are conducted to investigate frequentist properties of estimated models under noninformative priors. For illustration purposes, a real data set is presented, and the quality of models under noninformative priors is evaluated through posterior predictive checking.     

Feeling at home: Korean Americans in senior public housing

What are older Korean immigrants' cultural conceptions of home arrangements and environments? Does aging affect their family relationships? Why do they decide to move to public housing? How do they adapt to and re-create a feeling of home in public housing? This research in the field of aging-and-environment focuses on these questions. Based on a naturalistic field research of older Korean immigrants to the USA this paper details the transitions from loss of feeling of home in their pre-move life, the decision to move to senior public housing, to settling into the new apartment. The themes delineated are: 1) shifting roles in multigenerational households, 2) altered conceptualizations and changing environments, becoming dut-bang no-in (guest in own home), 3) detachment from prized objects, and 4) re-creation of meaningful environment. Revealed are the complex and interwoven nature of the decision to move involving experiences, events, and nested mini-decisions, as well as the emotional disruptions, loss of sense of self, and detachments that occur. The adjustments made by these older adults to the culturally inappropriate design in order to regain feeling at home are described. Several socio-physical phenomena and concepts identified are: a) spatial oblation, b) environmental and object detachment, c) object meaning linked to persons, and d) planned surrender or disposal of cherished objects.