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排序方式: 共有640条查询结果,搜索用时 281 毫秒
631.
Agricultural change and restructuring: recent evidence from a survey of agricultural households in England 总被引:3,自引:0,他引:3
Despite widespread speculation about the likely future extent of agricultural restructuring in the UK, researchers and policymakers are surprisingly ignorant of the nature and extent of farm household adjustment in the period since the mid 1990s. Meanwhile, claims that agriculture is in crisis and on the threshold of radical structural change continue to receive widespread media attention. Critics point out that because European policy debates are constructed in ways which emphasise the vulnerability of farmers and their businesses, there is a lack of attention to the true status and economic sustainability of agricultural households themselves. This paper reports results from a recent survey of agricultural business restructuring within six English study areas selected to span a range of agricultural settings and designed to identify the different trajectories of change to be found there. It concludes that while there is some evidence of disengagement from mainstream agriculture and an increasingly diverse set of relationships between the occupation and management of land, commitment to remaining in agriculture remains strong amongst farming families. A substantial proportion of agricultural and agri-environmental assets seem likely to remain in the same hands for the foreseeable future. 相似文献
632.
633.
Linear random effects models for longitudinal data discussed by Laird and Ware (1982), Jennrich and Schluchter (1986), Lange and Laird (1989), and others are extended in a straight forward manner to nonlinear random effects models. This results in a simple computational approach which accommodates patterned covariance matrices and data insufficient for fitting each subject separately. The technique is demonstrated with an interesting medical data set, and a short, simple SAS PROC IML program based on the EM algorithm is presented. 相似文献
634.
Ashutosh Prasad Kathryn E. Stecke Xuying Zhao 《Production and Operations Management》2011,20(1):129-142
Retailers often face a newsvendor problem. Advance selling helps retailers to reduce demand uncertainty. Consumers, however, may prefer not to purchase in advance unless given a discount because they are uncertain about their valuation for the product in advance. It is then unclear whether or when advance selling to pass some uncertainty risk to consumers is optimal for the retailer. This paper examines the advance selling price and inventory decisions in a two‐period setting, where the first period is the advance selling period and the second is the selling (and consumption) period. We find that an advance selling strategy is not always optimal, but is contingent on parameters of the market (e.g., market potential and uncertainty) and the consumers (e.g., valuation, risk aversion, and heterogeneity). For example, we find that retailers should sell in advance if the consumers' expected valuation exceeds consumers' expected surplus when not buying early by a certain threshold. This threshold increases with the degree of risk aversion but decreases with stock out risk. If the degree of risk aversion varies across consumers, then a retailer should sell in advance if the probability for a consumer to spot buy is less than a critical fractile. 相似文献
635.
Kelly PJ Sylvia E Schwartz L Cobb AK Veal K 《Journal of psychosocial nursing and mental health services》2006,44(6):31-36
Photography projects are an alternative teaching method that can be easily integrated into community programs with adolescents and children. This article provides a brief review of the use of photography in documenting social and health issues. Two examples of community photography projects with easily ignored populations are described. These projects gave a voice to participants and allowed them to demonstrate their creativity with cameras. An implementation guide is presented to provide concrete suggestions for implementing community photography projects. 相似文献
636.
Health care is in the midst of a consumer-oriented technology explosion. Individuals of all ages and backgrounds have discovered eHealth. But the challenges of implementing and evaluating eHealth are just beginning to surface, and, as technology changes, new challenges emerge. Evaluation is critical to the future of eHealth. This article addresses four dimensions of eHealth evaluation: (1) design and methodology issues; (2) challenges related to the technology itself; (3) environmental issues that are not specific to eHealth but pose special problems for eHealth researchers; and (4) logistic or administrative concerns of the evaluation methodology selected. We suggest that these four dimensions must be integrated to provide a holistic framework for designing and implementing eHealth research projects, as well as for understanding the totality of the eHealth intervention. The framework must be flexible enough to adapt to a variety of end users, regardless of whether the end user is a healthcare organization, a for-profit business, a community organization, or an individual. The framework is depicted as a puzzle with four interlocking pieces. 相似文献
637.
Kathryn A. Kerns Manfred H. M. Dulmen Logan B. Kochendorfer Carli A. Obeldobel Marissa Gastelle Alexandra Horowitz 《Social Development》2023,32(1):98-116
Relationships with pet dogs are thought to provide substantial benefits for children, but the study of these relationships has been hindered by a lack of validated measures. Approaches to assessing the quality of children's pet dog relationships have tended to focus on positive relationship qualities and to rely on self-report questionnaires. The aim of this study was to develop and test multiple measures that could be used to assess both positive and negative features of children's relationships with pet dogs. In a sample of 115 children ages 9–14 years who were pet dog owners, we assessed six qualities of pet dog relationships: Affection, Nurturance of Pet, Emotional Support from Pet, Companionship, Friction with Pet, and Pets as Substitutes for People. All qualities were assessed with child questionnaires, parent questionnaires, and child daily reports of interactions with pets. We found substantial convergence in reports from different observers and across different measurement approaches. Principal components analyses and correlations suggested overlap for many of the positive qualities, which tended to be distinct from negative relationship qualities. The study provides new tools which could be used to test further how relationships with pets contribute to children's development. 相似文献
638.
Kathryn J. L. Jacobson Jacqueline N. Hood Harry J. Van Buren 《Business and Society Review》2014,119(3):337-358
Chief Executive Officers and other organizational leaders can affect how corporate social responsibility initiatives are perceived in their organizations. However, in order to be successful with regard to promoting CSR, leaders need to have strong network competencies and to move beyond charismatic leadership. In this paper we offer a critique of charismatic leadership as it relates to CSR, posit that the intellectual stimulation brought about by transformational leadership is more important in this regard, propose that internal and networking is a leadership competence highly relevant to CSR, and emphasize the importance of working through highly credible opinion leaders in promoting CSR. 相似文献
639.
Megan W. Patterson Lilla Pivnick Frank D. Mann Andrew D. Grotzinger Kathryn C. Monahan Laurence D. Steinberg Benjamin Oosterhoff Jennifer L. Tackett Elliot M. Tucker-Drob K. Paige Harden 《Journal of research on adolescence》2023,33(2):680-700
Adolescence is a peak period for risk-taking, but research has largely overlooked positive manifestations of adolescent risk-taking due to ambiguity regarding operationalization and measurement of positive risk-taking. We address this limitation using a mixed-methods approach. We elicited free responses from contemporary college students (N = 74, Mage = 20.1 years) describing a time they took a risk. Qualitative analysis informed the construction of a self-report positive risk-taking scale, which was administered to a population-based sample of adolescents (N = 1,249, Mage = 16 years) for quantitative validation and examination of associations with normative and impulsive personality. Sensation seeking predicted negative and positive risk-taking, whereas extraversion and openness were predominantly related to positive risk-taking. Results provide promising evidence for a valid measure of adolescents' engagement in positive risks. 相似文献
640.
Kathryn R. Gallardo Sarah C. Narendorf Christine M. Markham Michael D. Swartz Diane Santa Maria 《Child & Family Social Work》2023,28(1):248-257
The relationships that youth experiencing homelessness (YEH) have with supportive family members (i.e. those who provide them with social support) may be protective against risk behaviours and buffer adverse health outcomes. However, little is known about the nature of YEH's supportive family relationships and the type of social support that these family relationships offer them. Thus, we conducted in-depth interviews with 30 YEH to examine the type of social support received from family relationships and to explore the social dynamics of these relationships. We found that many YEH not only continued to maintain relationships with family members after becoming homeless but also received emotional and/or instrumental support from these family members. Beyond providing this type of social support, family members served as a source of motivation for these youth. Additionally, YEH contributed to their family relationships and gained a sense of connectedness in return. Lastly, we found that YEH's family support was influenced by their family circumstances and their need for autonomy. Collectively, our findings suggest there may be a need for interventions designed to strengthen relationships with supportive family members among YEH, who may derive multiple positive benefits from relating with the ‘hidden champions’ in their lives. 相似文献