Model specification tests against non-nested alternatives

Non-nested hypothesis tests provide a way to test the specification of an econometric model against the evidence provided by one or more non-nested alternatives. This paper surveys the recent literature on non-nested hypothesis testing in the context of regression and related models. Much of the purely statistical 1iterature which has evolved from the fundamental work of Cox (1961, 1962) is discussed briefly or not at all. Instead, emphasis is placed on those techniques which are easy to employ in practice and are likely to be useful to applied workers.     

Partners in the Spiritual Dance: Learning Clients’ Steps While Minding All Our Toes

We present four case illustrations highlighting the complex interplay of therapists’ and clients’ spirituality in therapy. Complexity, in these cases, results from (a) degrees of similarity and difference, both real and perceived, between clients’ and therapists’ spiritual beliefs and practices; (b) degrees of spiritual disclosure; (c) characteristics of the therapeutic relationship; and (d) geographic and cultural influences. Practicing therapists and therapist training programs can benefit from addressing how therapist and client spirituality intersect and influence therapy, how both similarity and difference present obstacles and opportunities, and how ambiguity and assumptions can contribute to misunderstandings. We believe that both the therapist’s and the client’s spiritualities are key influences in therapy that can contribute to the frustration, and the growth, of clients and therapists alike.     

Performance of the weighted least squares apprdach to categorical data analysis

The weighted least squares method of Grizzle, Starmer and Koch is a common and convenient way to analyze categorical data. Tests of significance based on this method are typically performed by calculating a quadratic form which is asymptotically distrib-uted as a chi-square random variable under an appropriate null hy- pothesis.

This paper explores the validity of this distributional approximation for small samples in terms of the accuracy and power associated with this chi-square statistic. We report simulation results from the weighted least squares method applied to balanced factorial experiments, The simulations which constitute the majorpart of this work also provide insight into the relative performance of several response functions.     

On the asymptotic properties of fuzzy c-means cluster prototypes as estimators of mixture subpopulation centers

Several computational studies suggest that the fuzzy c-means (FCM) clustering scheme may be used successfully in some cases to obtain estimates for the parameters of a statistical mixture (e.g., for a mixture of normal distributions). While these (limited) simulation results for the fuzzy c-means approach support this hypothesis, we provide herein an example that shows that the FCM cluster prototypes cannot generally be statistically consistent estimators of the centers (means) of any univariate mixture having symmetric component distributions     

Social Media Policy in Social Work Education: A Review and Recommendations

Although social media use has grown dramatically, program policies have not kept pace. Some programs now state that student social media activities have led to professional conduct reviews and may violate ethical standards. This article reviews current social media policies and conceptualizes their key elements. A review of current social media policies is reported, pointing to the need for further policy development. Six domains of a social media policy are identified: understanding social media, ethical and legal obligations, implications of one’s personal and professional online presence, institutional obligations to the program and agency, productivity implications, and possible consequences for violations of the policy. A model social media policy is detailed, and unresolved issues are identified.     

Do Legacy Industrial Sites Produce Legacy Effects in Ethnic and Racial Residential Settlement? Environmental Inequality Formation in Rhode Island’s Industrial Core1

This study advances understanding of environmental inequality by examining its production through the interaction of two ubiquitous and ongoing urban-ecological processes: industrial land-use changes and changing patterns of residential segregation. We employ longitudinal data from the Rhode Island Directory of Manufacturers (1953–2012) and tract-level US Census data measured at four panel-years (1980, 1990, 2000, and 2010) to study the effects of these interactions in Rhode Island’s historical industrial cities of Providence, Pawtucket, and Central Falls. Spatial patterning analysis and hybrid spatial panel modeling of residential exposure to active and legacy industrial sites in relation to ongoing racial and industrial change reveal two novel findings. First, we find a “legacy effect,” suggesting that the spatial organization of industrial activities prior to the study period has measurable impacts on patterns of residential segregation in later decades. Our results also indicate that over the study period Latinx and African-American residents have become increasingly less likely to bear disproportionate impacts of active manufacturing sites, despite very different spatial patterns of population growth. This is strong evidence that environmental inequality formation is a variable process in which historically distinct pathways can lead to similarly disproportionate exposure to environmental risk.     

The art of resilience: photo-stories of inspiration and strength among people with HIV/AIDS

Using the visual arts to aid healing is a common therapy for people with critical illness, yet the use of art to improve the lives of people with HIV is under-utilised. Eight male and 20 female participants living with HIV in urban areas of the Midwest, United States, participated in three group photovoice photo-sharing and discussion sessions, post-project individual interviews and a community photo exhibit. We used a grounded theory approach to analyse interview data and identified three key themes: (1) health and wellness, (2) fear and stigma and (3) restoring a threatened identity. Participants identified how taking photos, reflecting on and sharing them in focus groups helped them express themselves while living with and coping with HIV. Offering photography as form of expression is a way to foster strength and, consequently, improve the lives of people living with HIV. Our participants benefitted from the process of telling their story with images. They were able to express positive aspects of their lives which could be a healthy form of catharsis in and of itself. Future research should continue to investigate how participants in participatory approaches like photovoice actually do benefit from the research. Although we focused this analysis on resilience, photovoice is flexible and participants’ responses to it are varied. Additional outcomes such as impact on mental and physical health are worthy of additional exploration.     

Daily perceptions of relationship quality with leaders: implications for follower well-being

ABSTRACT

We examined how a key relationship at work, an employee’s relationship with their leader, affects employee daily well-being. In a study of 129 employees across a variety of industries, we examined how follower perceptions of their daily leader–member exchange (LMX) quality across a workweek influenced their well-being (n?=?468 observations). Results provided general support for our hypotheses. Specifically, we found that on days when employees perceived a higher quality LMX relationship with their leader, they were more likely to report a sense of belongingness, which was then positively associated with daily reports of vigor and negatively associated with emotional exhaustion. Lagged analyses showed that perceptions of LMX quality were also negatively associated with reports of emotional exhaustion the following workday suggesting that these effects may persist over time. Finally, we found that day-to-day variation in reports of LMX quality attenuated the beneficial effects of LMX on relatedness and vigor supporting our hypothesis that uncertainty related to resource availability may contribute to a threat mindset focused on resource conservation rather than engagement. Implications and future research on leadership and employee well-being are discussed.