We estimate two well-known risk measures, the value-at-risk (VAR) and the expected shortfall, conditionally to a functional variable (i.e., a random variable valued in some semi(pseudo)-metric space). We use nonparametric kernel estimation for constructing estimators of these quantities, under general dependence conditions. Theoretical properties are stated whereas practical aspects are illustrated on simulated data: nonlinear functional and GARCH(1,1) models. Some ideas on bandwidth selection using bootstrap are introduced. Finally, an empirical example is given through data of the S&P 500 time series. 相似文献
Auctions provide an institutional solution to a social problem; they enable the legitimate pricing and exchange of goods where those goods are of uncertain value. In turn, auctions raise a number of social and organizational issues that are resolved within the interaction that arise in sales by auction. In this paper, we examine sales of fine art, antiques and objets d'art and explore the ways in which auctioneers mediate competition between buyers and establish a value for goods. In particular, we explore how bids are elicited, co-ordinated and revealed so as to rapidly escalate the price of goods in a transparent manner that enables the legitimate valuation and exchange of goods. In directing attention towards the significance of the social interaction, including talk, visual and material conduct, the paper contributes to the growing corpus of ethnographic studies of markets. It suggests that to understand the operation of markets and their outcomes, and to unpack issues of agency, trust and practice, we need to place the 'interaction order' at the heart of analytic agenda. 相似文献
This article presents the findings of a four-year survey on the development of social work education in Russia from 1995 to the present day. Through a series of questionnaires, interviews and discussions with Russian academics, practitioners and students, the study looks at a variety of issues including the high rate of attrition. It focuses on aspects of students’ practice placements such as the type, length and quality of practice placements, the students’ workload and the supervision provided. It also looks at the contribution that international collaboration has made to the development of social work education in Russia.
The survey concludes that there is a need to enhance the overall package for social workers and raise the status of the profession in order to retain qualified personnel. Longer practice placements which start in the first year and are adequately funded and supervised are seen as the key to retaining new graduates. It concludes that although international projects have made a difference to those participating at the time, it is difficult to disseminate these benefits beyond the immediate region. Now that international funding to Russia has been reduced it is critical that any remaining funding is accurately targeted and properly coordinated. 相似文献
AimThe aim of this study was to explore the experiences of shared learning between Australian and Balinese midwifery students during a two-week clinical placement in Bali Indonesia.BackgroundCultural safety in midwifery is a key concept that is underpinned by the provision of holistic quality midwifery care to all women. Therefore, culturally safe midwifery care identifies, protects and promotes women’s individual cultures and is a key concept that is fostered in midwifery education. To educate culturally safe midwives, international placements to resource limited countries have become more common within midwifery education programs.MethodsThis study used a qualitative research design with a convenience sampling design. The participants were enrolled in midwifery courses in a University in the Northern Territory of Australia (n = 9), a Balinese private midwifery school (n = 4) and a Balinese public midwifery school (n = 4). Thematic analysis was used to analyse the data.FindingsThe findings were categorised into major themes under the headings of “Learning together despite differences”; “Cultural differences”, “Communication, Resources”, and “Recommendations for future placements”.ConclusionThis study provides a valuable insight into how shared learning increases students’ midwifery knowledge and is fundamental in understanding cultural differences that could be applied to students’ clinical midwifery practice. 相似文献
ABSTRACTStudents’ emotions during stays abroad have mainly been treated as ”culture shock”, where difficulties are interpreted as universal ”stages” towards ”adaptation”. This paper explores how students from different cultural and educational traditions experience studying abroad differently. The study presents a qualitative study of 18 Danish and Chinese students in Chinese and Danish universities and situates itself within the literature on culture shock, student emotions and study-abroad experiences. The study exposes the students’ complex emotions throughout their studies abroad and explains how these emotions relate to processes of self-formation, professional and academic development, increase or decrease in freedom, and student agency. 相似文献