On minimaxity of the normal precision matrix estimator of Krishnamoorthy and Gupta

We consider the orthogonally invariant estimation problem of the inverse of the scale matrix of Wishart distribution using Stein's loss (entropy loss). In this problem Krishnamoorthy and Gupta [2] Krishnamoorthy, K. and Gupta, A. K. (1989). Improved minimax estimation of a normal precision matrix. Canad. J. Statist., 17: 91–102. [Crossref], [Web of Science ®] , [Google Scholar] proposed an estimator and showed its good performance in a Monte Carlo simulation. They conjectured their estimator is minimax. Perron [3] Perron, F. (1997). On a conjecture of Krishnamoorthy and Gupta. J. Multivariate Anal., 62: 110–120.  [Google Scholar] proved its minimaxity for p?=?2. In this paper we prove it for p?=?3 by using a new method.     

The Zen of physician initiatives

Many physicians today feel ravaged by the brutal speed with which change has been occurring. They see the beliefs and practices of a lifetime being abandoned and replaced by the flavor of the month, management du jour. But if you are willing and able to take the brave step of approaching your physicians without an agenda, meeting with them to listen to their concerns, and can also avoid hanging a lightning-rod label on every bright new idea that comes out of the sessions, you'll be on the way to effective new management. This new style is a "Zen" approach (but don't give it that label) that lets real collaboration come into the place that is supposed to be all about healing--the health care organization. From "never call it anything" to "stay with them until they get it," ideas on how to be a Zen manager are presented, with the ultimate goal of truly partnering with physicians and infusing them with a desire to move beyond the frustration and disenchantment they are feeling.     

Moral dialogs and public opinion research

Etzioni’s article is thought provoking, and contains a series of arguments that would be useful lines of inquiry for scholars of public opinion. In many ways, these ideas link to, and can enrich existing areas of research on opinion formation, opinion change, and political behavior more broadly. Specifically, the elite vs. mass nature of these dialogs, the extent to which they are actual political discussions, and the impact of polarization on them are avenues where these ideas can inform broader understandings of public opinion, and vice versa. Etzioni’s arguments about the role of morals in political discussion and as agents of opinion change warrant further inquiry.     

‘Drink a 12 box before you go’: pre-loading among young people in Aotearoa New Zealand

The practice of pre-loading—drinking large amounts of alcohol rapidly in private spaces prior to socialising in the night-time economy—has come to notice recently in the study of alcohol-related harm, but no studies have explored these phenomena in Aotearoa New Zealand. We used a theoretical framework developed with public health alcohol studies for understanding drinking cultures that conceptualises patterns of behaviours as arising within a dynamic interaction between forces of hedonism, function and control. We report findings from 34 focus groups conducted with 18–25 year olds as part of a project supported by the Marsden Fund, between 2011 and 2012, to investigate drinking cultures among young people. Our thematic analyses of participants’ accounts of pre-loading show that the term is in common use, applying to a range of practices motivated by price of alcohol but influenced by the pleasures of intoxication, the importance of peer processes and certain aspects of the regulatory system. We conclude with a discussion of the usefulness of the framework and the implications of the findings for public health policy that aims to reduce alcohol consumption and the harm that arises from it.     

Elder Abuse and Neglect in African American Families: Informing Practice Based on Ecological and Cultural Frameworks

Despite the rapid growth of the elderly African American population in the U.S., elder abuse and neglect in African American families continue to be underdeveloped areas of study. This article presents an ecological and culturally informed framework for the study of elder abuse in African American populations. The model was developed based on Bronfenbrenner's Human Ecological Theory. The model identifies risk factors associated with different systems that have an influence on the lives of African American families. Cultural protective factors also are identified in the model. The model is intended to provide an understanding of elder abuse and neglect in African American families by considering the influence of contextual factors such as the legacy of slavery, social exclusion, and structural segregation and racism. Specific suggestions for practice are proposed according to cultural strengths of African American communities as well as the ecological premises of the model.     

Relational Factors Associated With Depressive Symptoms Among Stroke Survivor-Spouse Dyads

Depression following stroke is a major problem for survivors and spouses, but few studies have focused on the experiences of couples. This study investigates associations between perceived relationship quality, communication and coping patterns, interpersonal misunderstandings and expectations, and survivors’ and spouses’ depressive symptoms after controlling for sociodemographic and proximal factors. It also compares the relative strength of these associations between partners to identify shared versus unique correlates of depressive symptoms. This study adds to a thus far underdeveloped literature about the range of factors that affect partners’ psychosocial adjustment to stroke. Implications for practice, research, and theory are discussed.     

Using photography to understand change and continuity in the history of residential care for older people

The Last Refuge by Peter Townsend is a seminal study of residential care for older people. The fieldwork was carried out in the late 1950s and the data are now deposited in the National Social Policy and Social Change Archive at the University of Essex. We have undertaken research, funded by the ESRC, which has revisited Townsend's work and some of the homes he studied in order to conduct an overtime comparison. In this paper we focus on Townsend's use of photography and our subsequent use of photography in our revisiting study. We argue that although Townsend did not analyse his photographs, they were significant data for use in his arguments critiquing residential care. They were, however, the product of a different socio‐historical context to our own and as such posed considerable practical and ethical challenges for us when attempting to use this aspect of his methodology for an overtime comparison. We argue that despite the resulting constraints, photography was an important part of our methodology, enabling comparisons and illuminating historical patterns in residential care for older people.     

Rainfall Patterns and U.S. Migration from Rural Mexico

In many rural regions of developing countries, natural resource dependency means changes in climate patterns hold tremendous potential to impact livelihoods. When environmentally‐based livelihood options are constrained, migration can become an important adaptive strategy. Using data from the Mexican Migration Project, we model U.S. emigration from rural communities as related to community, household and climate factors. The results suggest that households subjected to very recent drought conditions are less likely to send a U.S. migrant, but in communities with drought two years prior and with strong migration histories, emigration is much more likely. In regions lacking such social networks, rainfall deficits actually reduce migration propensities, perhaps reflecting constraints in the ability to engage in migration as a coping strategy. Policy implications emphasize diversification of rural Mexican livelihoods in the face of contemporary climate change.     

The truncation-by-death problem: what to do in an experimental evaluation when the outcome is not always defined

Although experiments are viewed as the gold standard for evaluation, some of their benefits may be lost when, as is common, outcomes are not defined for some sample members. In evaluations of marriage interventions, for example, a key outcome--relationship quality--is undefined when a couple splits up. This article shows how treatment-control differences in mean outcomes can be misleading when outcomes are not defined for everyone and discusses ways to identify the seriousness of the problem. Potential solutions to the problem are described, including approaches that rely on simple treatment-control differences-in-means as well as more complex modeling approaches.