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251.
Children in family foster care have the right to participate in decisions regarding their life, however, adults often advocate on behalf of children. This Q methodological study explored whether shared perspectives among foster parents and care workers resemble shared perspectives of youth regarding the psychosocial needs experienced by youth with a history of sexual abuse. Participants sorted a set of statement cards according to what they thought was most important for youth. By-person factor analyses examined how the Q sorts of foster parents and care workers related to those of youth. The results showed that foster parents mostly recognized the group of youth who value an instrumental relationship with their carers, while care workers mostly recognized the group of youth who value support of both foster and birth parents with regard to their preparation for independent living. The two youth groups characterized by ambivalence and autonomy were barely recognized. Results are discussed in light of the expected roles of foster parents and care workers, and youth’s contact with birth parents. Lastly, this study highlights the importance of youth participation, because youth offer unique and varying perspectives about their needs.  相似文献   
252.
This research note illustrates how European national delegates to the Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES) perceive the challenges, needs, gaps and opportunities related to the policy implementation of “Nature’s contributions to people (NCP)” in their nation. Until now, only little information has been available on how IPBES delegations perceive national policy-uptake and the implementation of the IPBES core concept of NCP. Based on an online survey with IPBES delegates, we aim to provide a stock-take of how IPBES delegations see NCP currently being incorporated in national government policies in Europe and how these policies are being implemented through programmes. Survey results show IPBES delegates consider a lack of relevant data and methodologies for NCP assessments to be a major obstacle to the uptake and implementation of NCP concepts in Europe. We wonder if availability of data and methodologies are the most prominent challenges to make IPBES a success, and consider the need for policy uptake and implementation to be more prominently addressed within the IPBES process.  相似文献   
253.
Commodity trading is typically organized hierarchically: Large‐scale trade takes place at the global price system while individuals trade at local price systems within their countries. Agencies or trading houses establish the link between these different market places. In this paper, we devise a framework to study this type of hierarchical trade. We identify the free trade and the autarky equilibrium as polar cases. We show that no other two‐stage market equilibria exist if the commodity space is two‐dimensional. An example demonstrates that other, so‐called intermediate equilibria exist for three‐dimensional commodity spaces. We then provide an explicit construction of special classes of intermediate equilibria. Moreover, we study the consequences when some countries control the agency that organizes trade at the global level and we analyze the role of international goods arbitrage. Finally, we show that profit‐maximizing agencies may not promote free trade outcomes. (JEL D43, D50, F10)  相似文献   
254.
Recent studies showed that climate change and socioeconomic trends are expected to increase flood risks in many regions. However, in these studies, human behavior is commonly assumed to be constant, which neglects interaction and feedback loops between human and environmental systems. This neglect of human adaptation leads to a misrepresentation of flood risk. This article presents an agent‐based model that incorporates human decision making in flood risk analysis. In particular, household investments in loss‐reducing measures are examined under three economic decision models: (1) expected utility theory, which is the traditional economic model of rational agents; (2) prospect theory, which takes account of bounded rationality; and (3) a prospect theory model, which accounts for changing risk perceptions and social interactions through a process of Bayesian updating. We show that neglecting human behavior in flood risk assessment studies can result in a considerable misestimation of future flood risk, which is in our case study an overestimation of a factor two. Furthermore, we show how behavior models can support flood risk analysis under different behavioral assumptions, illustrating the need to include the dynamic adaptive human behavior of, for instance, households, insurers, and governments. The method presented here provides a solid basis for exploring human behavior and the resulting flood risk with respect to low‐probability/high‐impact risks.  相似文献   
255.
256.
NGO/NPO effectiveness remains a prominent concern for scholars and practitioners, but the literature on this issue is increasingly fragmented along disciplinary lines. We address this problem by presenting a comprehensive and interdisciplinary review of the literature on NGO and NPO effectiveness using citation analysis. In order to uncover commonalities across disciplines concerned with similar questions, we deploy a structured literature review using snowball sampling within citation networks. This approach limits author biases, fosters an interdisciplinary perspective, and adds a different methodological approach to conventional content-based literature reviews. Our review uncovers three trends: (1) there is broad scholarly consensus that unidimensional measures of effectiveness are not useful—even though such measures are commonly used by NGO/NPO rating agencies; (2) the scholarship on NGO/NPO effectiveness is dominated by conceptual works, while empirical studies remain rare; (3) a consensus on how to operationalize effectiveness remains elusive. These results suggest that progress in our understanding of NGO/NPO effectiveness requires enhanced efforts at crossing disciplinary divides, adding empirical analyses, and increasing attention to develop shared categories and methodologies.  相似文献   
257.
Is young people's sexuality becoming more fluid and less tied to steady, stable identity patterns? Are we developing into a society where sexual relationships between individuals of the same sex are no longer reserved for the small minority of gay men and lesbian women? Adherents of so-called queer theory have promulgated such views. Using a population-based sample of young adults (aged 19 to 26, N 2753), we investigated homosexual experiences, desire and identity. We found that levels of prevalence of homosexuality were primarily a function of the criteria we used. Using the most restricted ("narrow") definitions, we found that about one percent of both genders reported "exclusive" homosexual interest and identity. Using the most inclusive criteria, we found that one of ten young men and one of four young women reported having some homosexual experience, interest or identity. Still, the most striking finding involved the substantial gender-specific differences: homoerotic activity and interest are far more interwoven with heterosexual activity for women. There are strong indications that homosexuality is a lot more threatening and potentially in conflict with traditional male gender roles than we find to be the case for women. In other words, while there may be signs of more fluid sexual identity categories, this phenomenon primarily applies to women.  相似文献   
258.
Haller  Hans 《Theory and Decision》2000,49(4):313-338
This paper studies how the introduction of non-additive probabilities (capacities) affects the solvability of strategic games.  相似文献   
259.
Traditionally, immigrants’ propensity to naturalize is attributed to individual characteristics and the origin country. Recently scholars increasingly recognise that naturalisation decisions do not take place in a vacuum: they are conditioned both by the individual life course of immigrants, such as the age at migration and family situation, as well as the opportunity structure set by citizenship policies of the destination country. Yet it is less clear what impact specific policy changes have, and to whom these changes matter most. In this paper we address these questions by analysing citizenship acquisition among first generation immigrants in the Netherlands in light of a restriction in citizenship policy in 2003. We employ unique micro-level longitudinal data from Dutch municipal population registers between 1995 until 2012, which allow us to track naturalisation among different immigration cohorts. We find evidence that indeed naturalisation is part of a larger life course trajectory: immigrants who arrive at a younger age in the Netherlands naturalise more often and so do immigrants with a native partner, or a foreign-born partner who also naturalises. Policy also matters: migrants naturalise later and less often under more restrictive institutional conditions, especially migrants from less developed and politically unstable countries of origin.  相似文献   
260.
Understanding of the determinants of consumer confidence in the safety of food is important if effective risk management and communication are to be developed. In the research reported here, we attempt to understand the roles of consumer trust in actors in the food chain and regulators, consumer recall of food safety incidents, consumer perceptions regarding the safety of particular product groups, personality characteristics, and sociodemographics, as potential determinants of consumer confidence in the safety of food. Consumer confidence in the safety of food was conceptualized as consisting of two distinct dimensions, namely, "optimism" and "pessimism." On the basis of a representative sample of 657 Dutch consumers, structural equation modeling was applied to simultaneously estimate the effect of the determinants on both "optimism" and "pessimism." The results indicated that, to a considerable extent, both optimism and pessimism about the safety of food arise from consumer trust in regulators and actors in the food chain and the perceived safety of meat and fish rather than other product categories. In addition, support was found for the notion that optimism and pessimism are conceptually distinct, as these dimensions of confidence were partly influenced by different determinants. The results of this study imply that consumer confidence in the safety of food could be enhanced by improving both consumer trust in societal actors, and consumer safety perceptions of particular product groups.  相似文献   
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