Price-setting newsvendor with strategic consumers

We consider a newsvendor who sells a single product over a single season with the objective of determining both the selling price and stock quantity to maximize the expected profit. The customers are strategic and we consider two demand cases: additive and multiplicative. For each case, we derive the newsvendor׳s optimal decisions and demonstrate that neglecting the price-sensitivity of demand leads the newsvendor to make sub-optimal decisions. Moreover, we show that under certain conditions, strategic consumer behavior may positively affect the newsvendor׳s optimal expected profit in the additive demand case.     

美国小群体传播研究的范式与理论评述

＂小群体＂指成员彼此间有面对面互动关系和情感联系的群体,一般人数较少。小群体是人类生活基本环境与交流的重要场所。＂二战＂以后,对小群体传播的研究逐渐兴盛以至今天呈现出多条主线的景象。本文在研读相关文献的基础上,将美国小群体传播研究理论成果分为结构范式、功能范式、叙事范式和戏剧范式等四种范式,并对有关理论进行介绍,以期对我国学术界开展相关研究提供理论借鉴。     

Social Networks Derived from Affiliations and Friendships, Multi-informant and Self-reports: Stability, Concordance, Placement of Aggressive and Unpopular Children, and Centrality

This study compares three variations in how researchers construct middle childhood social networks: (1) with friendships or affiliations as a relational tie; (2) with children providing self reports of relationships, or in addition, multi-informant reports of relationships in which they are not involved; and (3) whether network computation is correlational or distance-based . The sample was 357 fourth- and fifth-grade students in 17 classrooms. The strongest differences were between self-reported friendship and affiliative networks. Results showed that compared with affiliations, friendship networks had smaller groups, more isolates, and lower fall-to-spring stability. Agreement in social placement between friendship and affiliative networks was generally average, but poor for unpopular and aggressive children. Multi-informant affiliative networks were most robust in their positioning of aggressive children. Multi-informant centrality was uniquely uncorrelated with aggression. Network computation differences were not substantial. Discussion focuses on recommendations for research and the educational promise of network technology.     

Practicing What We Preach: Creating Groups for Ourselves

ABSTRACT

This article focuses on the professional isolation faced by social group work practitioners and educators. It identifies the need for peer support and connection in an environment of limited opportunities for professional development. The paper describes and assesses long-term peer support groups initiated and developed by each of the authors, one for group work educators and the other for practitioners. It discusses the potential for expanding the development of such groups, which could benefit individual group workers as well as strengthen efforts to ensure the survival of group work.     

Towards a Model of Working Groups

No abstract available for this article.     

THE PREPARATORY INTERVIEW

An educational approach to preparing clients for group is a widely held concept delineated throughout the literature and research studies on group work practice. The author is suggesting an important additional component as part of any preparation model, focusing on the client's perceptions, expectations, fantasies and concerns about what it means to be a member of an organized group. This client focused process can have a positive impact on each individual's experience within the group as well as accelerating the formation of group cohesion. This is illustrated in forming groups for children of Holocaust survivors.     

A Pilot Study of 2 Brief Forms of Dialectical Behavior Therapy Skills Training for Emotion Dysregulation in College Students

Abstract

Objective: To examine the feasibility and initial efficacy of 2 abbreviated dialectical behavior therapy (DBT) skills training groups: emotion regulation skills only and emotion regulation with mindfulness skills. Participants: Participants were 24 undergraduates (aged 18–29) with significant emotion dysregulation who participated between February and May of 2010, 2011, and 2012. Methods: Participants participated in 2-hour weekly group sessions for 8 weeks and completed outcome measures at baseline, midtreatment, posttreatment, and 4-week follow-up. Results: Participants in both conditions made significant gains, with large effect sizes, across measures of emotion regulation, affect, skills use, and functioning. There were no differences between the 2 groups, suggesting no additive benefit of mindfulness skills. Conclusions: This pilot study provides support for the acceptability and efficacy of abbreviated DBT skills training in colleges, given significant improvements, positive feedback, and low attrition. Impediments to feasibility included recruitment difficulties, particularly due to scheduling constraints.     

Differential Assessment and Treatment of the School Age Child

No abstract available for this article.     

巧妙利用小组合作学习实现英语单元复习的高效性

比起形式丰富多彩的新授课,学生经常感到复习课枯燥乏味。为了激发学生的学习热情,在英语单元复习课上,采用小组合作学习的方式,引导学生开展各种各样的游戏和竞赛活动,使学生在宽松、愉悦的学习氛围中成功地将知识内化吸收,从而实现英语单元复习的高效性。     

"阴阳合德":壮族传统文化的精华——《布洛陀经诗》的性别哲学研究之二

《布洛陀经诗》虽然已超越"孤雌繁殖"的认识阶段,但却没有完全陷入男性"惟我独尊"的窠臼。其中关于男女祖神并尊的唱颂,以及对妇女地位和作用的某种肯定,都在一定程度上体现了壮族性别哲学的精髓。这些思想是我们在寻求性别和谐发展之道时可以借鉴的。