Agilität,Ambidextrie und organisationale Veränderungskompetenz. Rudi Wimmer über Erbe und Zukunft des Change Managements

Gruppe. Interaktion. Organisation. Zeitschrift für Angewandte Organisationspsychologie (GIO) - Univ.-Prof. Dr. Rudi Wimmer ist Professor für Führung und Organisation am Institut...     

Beyond and below racial homophily: ERG models of a friendship network documented on Facebook

A notable feature of U.S. social networks is their high degree of racial homogeneity, which is often attributed to racial homophily--the preference for associating with individuals of the same racial background. The authors unpack racial homogeneity using a theoretical framework that distinguishes between various tie formation mechanisms and their effects on the racial composition of networks, exponential random graph modeling that can disentangle these mechanisms empirically, and a rich new data set based on the Facebook pages of a cohort of college students. They first show that racial homogeneity results not only from racial homophily proper but also from homophily among coethnics of the same racial background and from balancing mechanisms such as the tendency to reciprocate friendships or to befriend the friends of friends, which both amplify the homogeneity effects of homophily. Then, they put the importance of racial homophily further into perspective by comparing its effects to those of other mechanisms of tie formation. Balancing, propinquity based on coresidence, and homophily regarding nonracial categories (e.g., students from "elite" backgrounds or those from particular states) all influence the tie formation process more than does racial homophily.     

Methodological Nationalism,the Social Sciences,and the Study of Migration: An Essay in Historical Epistemology1

The article examines methodological nationalism, a conceptual tendency that was central to the development of the social sciences and undermined more than a century of migration studies. Methodological nationalism is the naturalization of the global regime of nation‐states by the social sciences. Transnational studies, we argue, including the study of transnational migration, is linked to periods of intense globalization such as the turn of the twenty‐first century. Yet transnational studies have their own contradictions that may reintroduce methodological nationalism in other guises. In studying migration, the challenge is to avoid both extreme fluidism and the bounds of nationalist thought.     

Overviewing the transition of Markowitz bi-criterion portfolio selection to tri-criterion portfolio selection

Over 60 years ago, Markowitz introduced the mean-variance efficient frontier to finance. While mean-variance is still the predominant model in portfolio selection, it has endured many criticisms. One serious one is that it does not allow for additional criteria. The difficulty is that the efficient frontier becomes a surface. With it now possible to compute such a surface, we provide an overview on how Markowitz’s risk-return (bi-criterion) portfolio selection can be extended to tri-criterion portfolio selection. With a focus on the geometry of the extension, many graphs are used to illustrate.     

Educational Attainment and the Lesbian Wage Premium

This paper provides insight into the wage gap between lesbians and heterosexual women. Using data from the 2000 Decennial Census, we find a lesbian premium that equals approximately 10% for women without a bachelor’s degree, and is nearly non-existent for women with higher levels of education. These findings are consistent with proposition that the gap between lesbians’ and heterosexual women’s commitment to the labor market narrows at higher levels of education. We also find that controls for industry and occupation exert only a small effect on the gap between lesbian and heterosexual women’s wages.

Neue Arbeitswelt,Führung und organisationaler WandelNew Economy,Leadership and Organizational Change.

This article of the journal “Gruppe. Interaktion. Organisation.” analyzes and discusses current changes in the working environment with regard to the associated opportunities and risks. Due to the growing dynamism of the markets, digitization, the demographic change and the change of values the importance of flexibility and changeability as central prerequisites for organizational survival is rising constantly. At the same time organizations and employees make higher demands on each other. This shift in the “psychological contract” between employees and organization is discussed in the light of the characteristics of “generation Y”. The article concludes by summarizing consequences of these developments for work in organizations, leadership, change processes and consulting.     

A Preliminary Investigation of the Effectiveness of Attachment Therapy for Adopted Children with Reactive Attachment Disorder

The purpose of this preliminary investigation was to examine the effectiveness of attachment therapy for adopted children diagnosed with Reactive Attachment Disorder (RAD). Although attachment therapy is widely utilized in the practice community, outcomes of such therapy have not been well documented. In this study a pretest–posttest one-group design was used with a sample of 24 adopted children who received attachment therapy from trained, licensed therapists. Therapy was funded by the Georgia Office of Adoptions under a contract with a non-profit adoptive parent advocacy group which provided training of therapists and direct services to families. RAD was measured with the Randolph Attachment Disorder Questionnaire (RADQ), Third Edition; functional impairment was measured with the Child and Adolescent Functional Assessment Scale (CAFAS). Statistically significant decreases in scores on the RADQ and CAFAS from pretests to posttests indicate improvement for the children who received therapy. In spite of methodological limitations, the current study adds to the limited knowledge about effective treatment for RAD.     

Information technologies and the

conclusion The evolution in the role of middlemen has many important implications at the macro-economic level as well. In many markets, the negative employment effects of labor-saving technologies are offset by increases in the demand for labor as transaction costs fall and additional labor is needed to produce more goods and services. As discussed above, middlemen operate successfully in markets when private transactions are costly and inefficiencies exist. Many traditional aspects of this role are being replaced by information technologies. Generally, information technologies are a close substitute for match-making services, but are less suited for reducing privately held asymmetric information. The reduction in transaction costs and improved efficiencies in match mak-ing provided by information technologies increases the demand for expert services which further increases the returns to education and widens the earnings gap. The widening should be greatest in industries that concentrate on match-making services such as real estate, however a widening is likely to be present in most sectors. Middle-men with expertise beyond match making will remain viable, while those lacking value-adding expertise will be rapidly marginalized.     

Adoptive Mothers’ Perceptions of Reactive Attachment Disorder Therapy and its Impact on Family Functioning

The purpose of this qualitative study was to explore adoptive mothers’ perceptions of attachment therapy and its impact on family functioning. Sixteen mothers were interviewed 3 years after therapy. Analysis of the data revealed two sets of parental perceptions: first, attachment therapy was consistently supportive, emotionally painful, and physically safe; second, therapy preserved family structure, mothers remained committed to their children, and parenting was continuously stressful. This study highlights the need for further research on the treatment of children with attachment disorders and is not intended as a treatise on the efficacy of attachment therapy as a treatment modality.     

Healing components of a bereavement camp: children and adolescents give voice to their experiences

This qualitative study is the follow-up to a quantitative controlled study which showed a decrease in childhood traumatic grief and posttraumatic stress disorder symptoms in parentally bereaved children participating in a bereavement camp. The purpose of this study was to identify the healing components of this camp model. Semi-structured interviews with 19 children and 13 parents/guardians were conducted 3 to 9 months after participation in the bereavement camp. Therapeutic Interventions and Traditional Camp Activities emerged as themes. The themes are discussed in relation to previous research as are limitations of the study and the implications for theory, practice, and future research.