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In this paper we consider the newsvendor model with real options under discrete demand. We consider a mixed contract where the retailer can order a combination of q units subject to the conditions in a classical newsvendor contract and Q real options on the same items. We provide a closed form solution to this mixed contract when the demand is discrete and study some of its properties. In particular we demonstrate that a mixed contract may be superior to a real option contract when a manufacturer has a bound on how much variance she is willing to accept. 相似文献
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When early testing indicates a hearing loss, parents find themselves on a roller-coaster of experiences leaving little time or space for reflection. This study is based on interviews with families in the Flemish region of Belgium, one of the earliest in the world to introduce universal neonatal screening for hearing loss. Starting from a phenomenological approach, we explore parents’ accounts of their experiences in order to uncover the meanings of early parenting of a child identified with a label. Soon after birth, these parents encounter a different world in which intertwined discourses construct parenthood with a deaf child. During the process of becoming a parent, representations of deafness as impairment were omnipresent. In contrast to a medical and technological perspective that insists on the need to intervene as fast as possible, it is argued that the private and social implications of rapid intervention require explicit consideration. 相似文献
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Sigrid Rotering-Steinberg 《Gruppendynamik und Organisationsberatung》2009,40(2):125-127
Ohne Zusammenfassung 相似文献
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James S 《Children and youth services review》2011,33(2):308-321
This paper presents findings from a structured review of treatment models that are relevant to group care and residential treatment settings for children involved with the child welfare system. Initiated and guided by The California Evidence-Based Clearinghouse for Child Welfare, five treatment models — Positive Peer Culture, Teaching Family Model, Sanctuary Model, Stop-Gap Model, and Re-ED — were reviewed for effectiveness. In this paper, each model's treatment features are described and relevant outcome studies reviewed in terms of their effectiveness as well as relevance for child welfare practice. Findings indicate that four of the models are either supported or promising in terms of evidence for effectiveness. Implications for group care practice and research are discussed. 相似文献
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Received: December 30, 1999; revised version: July 19, 2000 相似文献
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Sigrid Rotering-Steinberg 《Gruppendynamik und Organisationsberatung》2007,38(1):25-42
There is a lack of evaluation of mentoring programs which however, in the practice, gains more and more in importance. Therefore, quantitative and qualitative evaluation studies, concerning the process of mentoring have been made in several different size companies as well as in frame of a comparison of mentoring-models in Austria and Germany.A case study which is connected to an evaluation-interview-study completes the perspective of the “women mentees”. At the end, a short is-analysis will be made which shows to what extent, evaluation of mentoring programs are evaluated by companies.The article concludes with a coaching or training program which enables mentors to establish a collegial support based on a structured advisory methodology. 相似文献
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In this paper we deal with shift scheduling of tank trucks for a small oil company. Given are a set of tank trucks with different characteristics and a set of drivers with different skills. The objective is to assign a feasible driver to every shift of the tank trucks such that legal and safety restrictions are satisfied, the total working times of the drivers are within desired intervals, requested vacation of the drivers is respected and the trucks are assigned to more favored drivers. We propose a two-phase solution algorithm which is based on a mixed integer linear programming formulation and an improvement procedure. Computational results are reported showing that the algorithm is able to generate feasible schedules in a small amount of time. 相似文献
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Sigrid James Susanne B. Montgomery Laurel K. Leslie Jinjin Zhang 《Children and youth services review》2009,31(9):990-1000
This study uses data from the National Survey of Child and Adolescent Well-Being (NSCAW) to provide estimates of sexual risk behaviors for 877 youth, age 11–14 at baseline, in the child welfare system. It examines the association between baseline psychosocial risk and protective factors on engagement in sexual risk behaviors after 36 months. It further compares rates of sexual risk behaviors between youth placed in out-of-home care and those who remained with their biological family. Key findings include a high rate of pregnancy, a high percentage of youth who initiated sexual activity at or before age 13 as well as a limited role of protective factors in moderating sexual risk behaviors. A history of placement into out-of-home care is not significantly associated with greater engagement in sexual risk behaviors. Implications for intervention development and child welfare policy for this population are discussed. 相似文献
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