Stochastic metafrontiers

ABSTRACT

We consider the case of production units arranged into a number of groups. All units within a group choose output–input combinations from the same production possibilities set that is represented by a stochastic frontier model. The metafrontier is the envelope of the group-specific frontiers. We are interested in the metafrontier distance, which is the amount by which the group-specific frontier lies below the metafrontier.

Previous work has measured the metafrontier distance using the deterministic portion of the frontier. In a stochastic frontier model, this is not appropriate. We show how to evaluate the metafrontier distance, and we demonstrate the empirical relevance of this issue.     

Depoliticising literature,politicising diversity: ethno-racial boundaries in Dutch literary professionals’ aesthetic repertoires

Although still a neglected area, over the years a growing body of sociological research on the position of ethno-racial minorities in Western artistic fields has emerged. With this article we aim to contribute to this research area by focusing on ethno-racial diversity in the Dutch literary field. Through in-depth interviews, we analyse how gatekeepers mobilise specific cultural repertoires and by doing so draw ethno-racial boundaries when discussing acquisition, assessing quality and positioning themselves in the literary field. We argue that literary publishers and other professionals (selectively) employ an ‘old school’ modernist repertoire that especially values the formal aspects of literary products, by which non-white writers and publishers concerned with diversity are often positioned in an identity politics framework. Their work is said to take in a less prestigious ‘political’/’subjective’ position rather than a ‘literary’/‘universal’ one. As such, this paper informs on how gatekeepers’ practices shape the position of non-white authors in the Dutch literary field.     

Solving Current Social Challenges: Engaging Undergraduates in Policy Practice

This article explores an innovation in teaching policy practice at the undergraduate level. It analyzes an experiential learning model that uses current social challenges as a compelling way to generate student learning about policy practice. Over the course of the semester, students examine antecedents, current issues, and potential solutions to a contemporary social issue through a series of assignments that build knowledge and skills and link the topic to larger social policy concerns. Using quantitative and qualitative evidence from seven semesters, the article explores benefits and challenges of this approach to teaching, and derives lessons for social work education.     

Achtsamkeit lernen im Offenen Dialog

Dialogue in the sense of David Bohm invites individuals and groups to consider together their ways of thinking and learning. By exploring mental models, which usually hinder reaching deeper agreement, this kind of dialogue opens new grounds and is, at the latest, since Peter Senge’;s management-bestseller “The fifth discipline” (1990), considered to be a basic process for team learning in groups and organisations. The article refers to university projects on ‘open dialogue’ with students at the universities of Oldenburg and Bochum between 2001–2003. Characteristics of “open dialogue” are represented as ways of attentiveness learning. Students practical reports are used to work out recommendations based upon “open dialogue” for the development of central deep ecology and human competences.     

Reshaping Clinical Practice for the New Millennium

In the new millennium, oppression will continue to affect social workers’ clients. This article discusses training clinical practitioners to address oppression. Drawing on poststructural, postmodern, feminist, and social constructivist theories, the article argues that to challenge oppression, clinical practice must address the dialectical relationship between private troubles and public issues while transforming professional relationships that disempower clients. The article describes a second-year MSW clinical practice sequence taught from feminist, poststructuralist, postmodern, and social constructionist perspectives, where students learn to assess the impacts of oppression, discover clients’ strengths, and respond in personal, social, and political contexts.     

Exploring the essence of enabling child participation within child protection services

The chances that children have to participate in child protection services are largely contingent upon the attitudes and skills of case managers. They have a crucial role in ensuring that a child's voice is being listened to and acknowledged in often sensitive dialogues. Therefore, the aim of this study is to investigate what case managers need to facilitate child participation. By handing case managers a participation toolbox developed by children and through the use of reflexive monitoring in action, we elaborated on the barriers faced in practice. The results show that the intention to facilitate child participation is quickly overruled by often subconscious thoughts and beliefs, stemming from the complex interplay of child image, protection, and participation. Case managers need to be aware of this interplay and how this unknowingly steers their actions. Therefore, iterative reflection should be facilitated within organizations for an actual change in their daily practice and to amplify the role of children in the decision‐making processes within child protection services.     

Pitch and Communicative Intent in Mother's Speech: Adjustments for Age and Sex in the First Year

This study investigated pitch and communicative intent in mothers' infant‐directed speech spoken to their infants at birth, 3, 6, 9, and 12 months. Audio recordings of mothers (6 with female, and 6 with male infants) talking to another adult and to their infant at 5 ages were low‐pass filtered and rated by 60 adults on 5 scales (Positive or Negative Affect, Express Affection, Encourage Attention, Comfort or Soothe, and Direct Behavior). Mean fundamental frequency (F₀) and pitch range of utterances were also measured. Utterances associated with positive affect tend to peak at 6 and 12 months, whereas more directive utterances peaked at 9 months. Mean F₀ followed the age trend for affective utterances, and pitch range followed the trend for directive utterances. The results suggest mother speech patterns reflect, complement, and perhaps facilitate infant development.