Computing some bayes estimates for the mean of a normal distribution

For sampling from a normal population with unknown mean, two families of prior densities for the mean are discussed. The corresponding posterior densities are found. A data analyst may choose a prior from these families to represent prior beliefs and then compute the corresponding Bayes estimator, using the techniques discussed.     

Life Course Transitions,the Generational Stake,and Grandparent‐Grandchild Relationships

Drawing on past research and prominent theoretical orientations, this research note suggests new approaches to intergenerational dynamics. For 316 grandparent‐grandchild pairs, we found that the transition of grandchildren to higher education, controlling for other transitions, improves the quality of the grandparent‐grandchild relationship. For grandparent mentoring, however, we see evidence of a generational stake, with grandparents overestimating their mentoring role, compared to grandchildren, during this transition. This generational stake reflects the importance of grandparent education, with increased mentoring for the college‐going grandchildren of college‐educated grandparents. These findings indicate that the intergenerational literature can be significantly advanced by taking a long‐term perspective, incorporating multiple points of view, and examining contextual variation. Moreover, greater understanding of these intergenerational ties will benefit research on families and individual development.     

Religion and vulnerability among low-risk adolescents

Studies of resilient youth have documented the helpful influence of religion in their lives. In the absence of positive influences among high-risk youth, religion and religious organizations in particular often serve to promote prosocial outcomes. This study, on the other hand, investigates whether religion and religious change are comparably effective influences in reducing the vulnerability of low-risk youth to drinking, drug use, delinquency, problems in school, and poor grades. Using data from the National Longitudinal Study of Adolescent Health, this study identified at least one influential aspect of religion that serves as a direct protective factor across each mode of vulnerability, and also documented indirect pathways of religious influence. We discuss the findings and consider the variable influence of religion on youth.     

浅谈西澳文学作品对海洋的关注

海洋一直是澳大利亚文学作品关注的焦点。在澳大利亚文学的发展过程中,对海洋的描写和关注已然成为澳洲作家和作品必不可少的一个部分。本文主要介绍了西澳作家及其文学作品对海洋的关注,并罗列了当今西澳文学界的主要作家及其关注海洋的主要作品,阐述了海洋话题在澳洲文学作品发展史上的普遍性和重要性。     

Optimal designs for calibration of orientations

This paper concerns designed experiments involving observations of orientations following the models of Prentice (1989) and Rivest &Chang (2006). The authors state minimal conditions on the designs for consistent least squares estimation of the matrix parameters in these models. The conditions are expressed in terms of the axes and rotation angles of the design orientations. The authors show that designs satisfying U₁ + … + U_n = 0 are optimal in the sense of minimizing the estimation error average angular distance. The authors give constructions of optimal n‐point designs when n ≥ 4 and they compare the performance of several designs through approximations and simulation.     

Occam's Razor in the contingency theory: A national survey on 86 contingent variables

The purpose of this study is to quantify 86 contingent variables and modify the construct of the contingency theory. A nationwide survey among public relations practitioners first enabled quantitative analysis of the 86 contingent variables affecting public relations practice, divided into 12 factors on two dimensions. This test gave parsimony to the matrix of 86 contingent variables initially offered in the matrix, provided validity to the contingency theory, and suggested its theoretical evolution measured against Occam's Razor, which holds that the simplest explanation is generally the most precise and thus the best approach to follow in building theories.