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181.
ABSTRACT: The object of this paper is to explore how to use administrative data for econometric purposes when these data measure total annual duration spent in various states. A basic issue addressed is whether the information extracted through categorising continuous data actually defines an economically meaningful concept of an individual position on the labour market. The main findings are that discretization indeed leads interpretable transitions on the labour market, and that the mobility between positions rather low in Belgium. 相似文献
182.
The vast majority of measures have, at their core, a purpose of personal and social change. If test developers and users want
measures to have personal and social consequences and impact, then it is critical to consider the consequences and side effects
of measurement in the validation process itself. The consequential basis of test interpretation and use, as introduced in
Messick’s (Educational measurement, Macmillan, New York, pp. 13–103, 1989) progressive matrix model of unified validity theory, has been misunderstood by many measurement experts, test developers,
researchers, and practitioners. The purposes of this paper were to (a) review Messick’s unified view of validity and clarify
his consequential basis of test interpretation and use, (b) discuss the kinds of questions evoked by value implications and
social consequences and their role in construct validity and score meaning, (c) present a reframing of Messick’s model and
a new model of unified validity and validation, (d) bring the concept of multilevel measures under the same validation umbrella
as individual differences measures, and (e) offer some thoughts and directions for more explicit consideration of value implications,
intended social consequences, and unintended side effects of legitimate test interpretation and use. This paper has implications
for the interpretation, use, and validation of both individual differences and multilevel measures in education, psychology,
and health contexts. 相似文献
183.
A new mortality model based on a mixture distribution function is proposed. We mix a half-normal distribution with a generalization of the skew-normal distribution. As a result, we get a six-parameter distribution function that has a good fit with a wide variety of mortality patterns. This mixture model is fitted to several mortality data schedules and compared with the Siler (five-parameter) and Heligman–Pollard (eight-parameter) models. Our proposal serves as a convenient compromise between the Heligman–Pollard model (which ensures a good fit with data but is often overparameterized) and the Siler model (which is more compact but fails to capture ‘accident humps’). 相似文献
184.
Urban growth is considered to be a major driver of environmental change. Urbanisation can affect urban biodiversity in different ways. So far, most studies focused on the impact of urbanisation on single taxa in one habitat type. In this study, we used data of species inventories and GIS-based landscape elements to examine the effects of habitat size and landscape composition on the species diversity of three taxonomic groups (vascular plants, Orthoptera and Lepidoptera) in meadows and ruderal sites in the urban region of Basel, Switzerland. We also related the responses of three species traits (body size, dispersal ability and food specialisation) to habitat size in Orthoptera and Lepidoptera. We found that species of the different taxonomic groups differed in their response to habitat size and landscape composition both in meadows and ruderal sites depending on the traits examined. The species richness of Orthoptera and Lepidoptera was positively related to meadow size but not to the size of ruderal sites, while the opposite was true for plants. For Lepidoptera in ruderal sites, the percentage cover of ruderal area in the closer surroundings was a better predictor of species richness than habitat size per se. To sustain high levels of urban biodiversity, we recommend that urban planners develop adequate management strategies to satisfy the different requirements of various taxonomic groups and to increase the quality of green sites surrounding the target habitat. 相似文献
185.
Against the background of rapid population ageing, studying social participation in later life is of particular relevance within the framework of active ageing. Although caring for grandchildren has taken a central role for older persons due to unprecedented overlap between grandparents’ and their grandchildren’s lives, whether the relationship between grandparental childcare and social activities is characterised by cumulation or competition remains under-explored. Grandparental childcare may increase the purpose in life for grandparents, stimulating their social participation, or it may impose time and energy constraints on it. This study aims to assess the effect of providing grandchild care on participation in social activities for people aged 50–85 in Europe. Using an instrumental variable approach on data from the Survey of Health, Ageing and Retirement in Europe, we find no significant negative effects of grandchild care on engagement in at least one social activity. However, regular provision of grandchild care has a significant negative effect on the number of activities in which grandmothers participate. When considering the activities separately by type we also find, for grandmothers only, a negative effect on volunteering, engagement in educational or training courses and participation in political or community-related organisation. 相似文献
186.
Les auteurs examinent les effets des TIC sur la productivité à partir d'un échantillon de 43 pays d'Afrique subsaharienne. Ils concluent que le développement des téléphonies fixe et mobile stimule la croissance de la productivité dans un processus à rendements croissants, confirmant l'existence d'un effet de réseau. Ainsi, la multiplication par deux du taux de pénétration des téléphonies fixe et mobile augmente les gains de productivité de 0,12 à 0,15 et 0,05 pour cent environ, respectivement. En outre, dans la région, l'accès facilité aux services bancaires et financiers serait l'un des vecteurs de l'effet de la téléphonie mobile sur la productivité. 相似文献
187.
Bruno De Cordier 《Journal of Muslim Minority Affairs》2014,34(2):134-151
Substantial research and reporting have been conducted on the position and dynamics of religion in the historically and culturally Muslim parts of the old USSR. Yet the question whether the reported increase in religious identification and practice in some sectors of society has led to the emergence of a faith-based social sector remains relatively under-examined. Through a detailed case study of Hajji ?lgar ?bragimo?lu and the Cüma Ehli in Baku, Azerbaijan, this article discusses the social base and modus operandi of Baku's new Islamic social activists, and sets this against the social and ideological changes and shifts that have occurred since the country and its society were confronted with and integrated into the current phase of globalization. 相似文献
188.
This study was carried out in a partnership with the Federal University of Pernambuco and the Faculty of Human Motricity of the Technical University in Lisbon (Portugal). The aim of the study was the measurement of human body segments throughout the digital photogramety, comparing and analysing data into Recife sample and to validate the Digital System as anthropometric survey tool. The result of the analysis has introduced: Data from the sample; Data by age; Data by Sex; Data by ethnicity; Data by region of birth; Difference of data from population individually. Besides to prove the true efficiency of the software. 相似文献
189.
Linnéa Bruno 《European Journal of Social Work》2018,21(2):181-192
The present paper deals with post-separation child positions in two domains of practice in the Swedish welfare state: welfare benefits such as financial aid and child contact. The area of concern is financial oppression in the context of parental separation. Empirically, the study draws upon three types of material: interviews with victimised mothers, court orders in welfare benefit appeals and court orders in contested contact cases. Findings suggest that financial abuse in the context of parental separation is a non-question in the domain of welfare benefits, and in the domain of child contact framed as a conflict between equal parties. Object without voice and with needs ignored was the typical child position in welfare benefits cases, whereas incompetent subject was more prominent in child contact cases. Age order as a form of domination may be reinforced by the practice of both domains. 相似文献
190.
Research on immigrants’ assimilation is widespread both in the U.S. and Europe. While it has been extensively studied how immigrants fare compared to natives on socio-economic indicators, few studies have focussed on immigrants’ perception of their position. In this paper we focus on comparing life satisfaction of immigrants and natives across Europe and on the role of social embeddedness. Using data from the first six rounds (2002–2012) of the European Social Survey, a repeated cross-sectional survey, we find that life satisfaction among immigrants is lower than among natives even though differences diminish over generations. For first generation immigrants part of the life satisfaction gap is explained by the lower level of social embeddedness they have compared to natives. We also find that social embeddedness is a key explanatory factor for life satisfaction for both immigrants and natives. For two out of the three indicators of social embeddedness that we consider we however find different patterns of association with life satisfaction for immigrants compared to natives. 相似文献