Exploratory analysis of verbal aggression in romantic relationships among unmarried men and women: Predictive patterns by gender and race

This is an exploratory study that examined verbal aggression in romantic relationships among unmarried Black and White women and men as a function of gender and race. We employed an ecological approach to examine the receipt of verbal aggression separately for men and women at the levels of individual, relationship, and community. We also explored whether gender-specific correlates of verbal aggression interacted with race. Analyses were based on a sample of 212 women and 133 men in non-marital romantic relationships recruited from 21 U.S. cities for a larger study. Linear mixed-effects models revealed that factors related to experiencing verbal aggression differed substantially for unmarried women and men in romantic relationships. Interesting racial differences also emerged distinctly for women and men.     

A new approach to solve open-partition problems

A partition problem in one-dimensional space is to seek a partition of a set of numbers that maximizes a given objective function. In some partition problems, the partition size, i.e., the number of nonempty parts in a partition, is fixed; while in others, the size can vary arbitrarily. We call the former the size-partition problem and the latter the open-partition problem. In general, it is much harder to solve open problems since the objective functions depend on size. In this paper, we propose a new approach by allowing empty parts and transform the open problem into a size problem allowing empty parts, called a relaxed-size problem. While the sortability theory has been established in the literature as a powerful tool to attack size partition problems, we develop the sortability theory for relaxed-size problems as a medium to solve open problems.     

Public's expectation about an organization's stance in crisis communication based on perceived leadership and perceived severity of threats

Considering the importance of general public support of an organization during a crisis, this study examined how perceived leadership style influences public expectation about an organization's stance in crisis and the relationship between perceived severity of threat and the expected stance of the organization based on leadership perception. The results of the study strongly supported main effects of leadership on public estimation about an organization's stance. Managerial implications were discussed.     

Random Pooling Designs Under Various Structures

Balding et al. (1995) showed that randomizing over the k-set space yields much better pooling designs than the random pooling design without the k-restriction. A natural question arises as to whether a smaller subspace, i.e., a space with more structure, will yield even better results. We take the random subset containment design recently proposed by Macula, which randomizes over a subspace of the k-set space, as our guinea pig to compare with the k-set space. Unfortunately the performance of the subset containment design is hard to analyze and only approximations are given. For a set of parameters, we are able to produce either an exact analysis or very good approximations. The comparisons under these parameters seem to favor the k-set space.     

The Rules of the Game: The Politics of National Pensions in Korea

This article explores the conditions in which policy changes occur over time. It studies the institutional pathways taken by national pensions in Korea over an extended period by identifying the key moments which have pushed through their development: initiation (1973), implementation (1988) and reform (1998). Public pensions have developed over time in an incremental fashion, bringing an ever‐growing proportion of the population under their umbrella. What accounts for this development? A number of factors may be at work. The elderly population has rapidly increased; the traditional extended family has increasingly become a nuclear one, meaning that what used simply to be a family issue of protecting the elderly has become a social matter; urbanization and industrialization have resulted in an ever‐growing number of life‐time contingencies such as unexpected income losses. Convincing as these socio‐economic accounts may seem, however, they offer only a snapshot, underscoring the politics of national pensions which stretch over long periods. This article seeks to answer how and in whose interest national pensions come on to the political agenda; how they are framed and defined; and how political actors respond to pressures for national pension reform. In each of the three stages, it is suggested, somewhat different institutional rules have operated. Defining institutional rules as ‘the process of who gets represented in the decision‐making processes’, this article identifies the different institutional rules which have played a pivotal role in the social policy‐making processes.     

A Remark on the Zhang Omnibus Test for Normality

Zhang (1999) proposed a novel test statistic Q for testing normality based on the ratio of two unbiased standard deviation estimators, q₁ and q₂, for the true population standard deviation σ. Mingoti & Neves (2003) discussed some properties of q₁ and q₂ and showed that the variance of q₁ increases as the true population variance increases. In this paper, we show that the distribution of q₁ is not normal. As a result, normality percentage points for Q are not appropriate. In this paper, percentage points of Q are obtained using simulations. Monte Carlo simulations are provided to evaluate the performance of the new method and Zhang's method.     

ETHNIC ENCLOSURE OR ETHNIC COMPETITION: Ethnic Identification Among Hispanics in Texas

Recent theoretical debates have focused on the utility of two alternative perspectives on ethnic identification. However, empirical support for either is neither consistent nor conclusive and previous analyses seldom conceptually or empirically examine the aggregate macrostructural determinants of ethnic identification. This study reevaluates the relative merits of the ethnic enclosure and ethnic competition perspectives among Texan Hispanics using aggregate 1980 Census of Population data for 139 Texas cities with large Hispanic populations. The rejection of the ethnic enclosure thesis in some recent research is unwarranted, as the empirical evidence provides it substantial support and little for the ethnic competition perspective. Further analyses of structural factors in ethnic identification are merited.     

Mitigating the effect of family poverty on academic and behavioral outcomes: The role of school climate in middle and high school

The persistent achievement gap between students from poor families and their peers calls for research that examines risk factors associated with poverty and strategies for promoting resilience. Research demonstrates the impact of school climate on behavior and academic achievement, especially in high-poverty schools. The present study examines associations between family poverty, social supports, students' perceptions of school climate, behavior, and grades. Poverty is associated with poor grades and behavior, while positive perceptions of school climate are associated with positive grades and behavior. Perceptions of school climate moderate the association between poverty and behavior, such that students from poor families who perceive a positive school climate exhibit similar behaviors to their peers from higher income families. Implications for practice, policy, and research are discussed.     

Workplace support and European fathers’ use of state policies promoting shared childcare

ABSTRACT

Social policies such as paternity leave and parental leave offer fathers the opportunity to be more involved in childcare than earlier generations of fathers. While such policies are increasingly offered by governments around the world, research by the International Network on Leave Policies and Research shows that many European fathers do not take advantage of these benefits, despite fathers’ growing interest in participation in early childcare. This article introduces a special issue devoted to understanding how the workplace can impact European fathers’ interest in and abilities to take leave, a topic that has received relatively little research attention. The articles in the special issue suggest that barriers to European fathers’ leavetaking are deeply embedded in workplace culture and work practices and will be difficult to eradicate without a dramatic challenge to the concept of the male ideal worker, who prioritizes work above family.     

Influential subsets on the variable selection

When one or few observations are deleted in the multiple linear regression model, they can affect the variable selection. In this paper we derived the formula for the Mallows C_p criterion when k observations are deleted and express it as a functionn of basic building blocks such as residuals and leverages. Also, two real date sets are used to see how the selected model changes as few observations re deleted.