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Relations between mothers’ mind‐mindedness (appropriate attunement to their infants’ internal states) at 6 and 12 months and infants’ early symbolic play during infant–mother pretense at 12 and 18 months were investigated in a sample of 43 mothers and infants. Mothers’ appropriate mind‐related comments were associated with average level, length, complexity, and maturity level of symbolic play. Specific sub‐categories of appropriate mind‐related comments were identified as independent predictors of children's symbolic play. Appropriate comments about desires and cognitions at 6 months were associated with average level and length of episodes, as well as with maturity level of symbolic play at 12 months. Longitudinal stability in the appropriateness and content of mothers’ mind‐related comments was also investigated. The results are discussed in terms of the proposal that attunement to specific types of internal state should vary as a function of infant age in order to index mind‐mindedness.  相似文献   
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Based on the theoretical foundation of well-being measurement, the study explores differences in living standards by analysing the distribution of tourism expenditure. A mixture of regression models is used to explore the heterogeneity in tourism consumption by identifying groups of families with similar tourism consumption behaviour as a function of certain socio-demographic and economic factors. The empirical analysis, performed on Italian expenditure data, suggests that there are three different patterns of consumption behaviour conditional to the socio-demographic and economic covariates in the tourism market and that differences in tourism consumption between groups of households mirror inequalities in living standards.  相似文献   
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The Health and Retirement Study (HRS) is funded by the National Institute on Aging of US with the aim of investigating the health, social and economic implications of the aging of the American population. The participants of the study receive a thorough in-home clinical and neuropsychological assessment leading to a diagnosis of normal, cognitive impairment but not demented, or dementia. Due to the heterogeneity of the participants into three classes, we analyze some overall cognitive functioning responses through a factor mixture analysis model. The model extends recent proposals developed for binary and continuous data to general mixed data and to the situation of observed heterogeneity, typical of the HRS study.  相似文献   
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A major challenge in child welfare is whether a program (or service) developed and successfully implemented in one jurisdiction, especially another country, will attain the same outcomes for children and families in another jurisdiction? This paper presents the “DCE Classification System” (Defining, Classifying, and Evaluating), a classification system that facilitates cross-jurisdiction comparisons of child and family services. The paper reviews the cross-national research literature in child and family services as well as literature on classification schemes and typologies. As an example of the issues that arise when importing a promising program, we briefly highlight the exporting and importing of family group conferencing. After tracing the history and development of the DCE Classification System, the paper describes the proposed classification scheme, and provides a brief example of how researchers and practitioners can use the classification system for cross-national comparisons of client outcomes and program costs. Finally, we discuss the strengths and weaknesses of this approach, as well as possible benefits for child and family practices.  相似文献   
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Trees provide important ecological services in cities, yet the vulnerability of the urban forest to massive tree losses from pest outbreaks could threaten those services, with unknown environmental consequences. The outbreak of emerald ash borer is an imminent threat to the ash population in North America. In the Minneapolis?CSaint Paul, Minnesota, metropolitan area, ash trees are present in 50?% of residential landscapes in Ramsey and Anoka Counties. We used a large survey of household activities, a tree inventory, a Household Flux Calculator accounting tool, and a set of annual evapotranspiration measurements, to quantify the current carbon, nitrogen, and phosphorus storage in ash trees, the cycling of these elements, and the total evapotranspiration from ash trees in residential areas in the metropolitan region. Ash represented 6?% of the trees in residential areas and the removal of the entire ash population would correspondingly reduce net primary production and carbon sequestration by only a few percent and would have negligible effects on losses of nitrogen and phosphorus from residential landscapes. Similarly, the effects of ash loss on the hydrologic cycle would be minimal and would depend largely on management choices for the ground currently underneath ash tree canopies. Overall, the percentage change in biogeochemical and hydrological fluxes corresponded closely with the percent of the total urban tree population that was represented by ash, suggesting that areas with higher densities of ash would experience correspondingly larger effects. A hypothetical tree replacement scenario with similar broadleaf species was determined to be likely to re-establish the original biogeochemical and hydrological conditions once the replacement trees reach maturity.  相似文献   
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European Journal of Population - Many studies in different settings have suggested that migrants from countries with skewed sex ratios at birth tend to adjust the sex of their offspring to ensure...  相似文献   
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Cinzia Rienzo 《LABOUR》2014,28(3):288-308
This paper assesses the effects of immigration on the increasing residual wage inequality in the USA and UK from 1994 to 2008. It does so by using an extension of the Lemieux (2006) methodology, whereby counterfactual residual variances are constructed to account not only for composition effects (changes in education‐experience of the workforce), but also for increasing immigration in the labour force. The empirical analysis reveals that residual wage inequality is higher among immigrants than among natives. However, increase in immigration does not seem to represent the major force behind the increase in residual wage inequality for the USA and for the UK.  相似文献   
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The role of structural characteristics of the residential context in influencing adolescents’ Sense of community (SoC) has received limited consideration in the literature. Aim of this study was to assess SoC in male and female adolescents living in two Italian provinces characterized by different positions on indicators of quality of life. The moderating role of adolescent gender and age group on SoC was also considered. The sample includes 1,182 adolescents: 46.2 % male and 53.8 % female. Age ranged from 16 to 22 years (M = 17.5; SD = 1.23). Findings indicate that levels of Sense of community differ between the two provinces and are higher among adolescents living in the more “advantaged” context (Rimini) based on quality of life objective indicators. Males score higher than females except in the more “advantaged” context, whereas girls experience greater opportunities for influence. SoC tends to decrease with age, as the context becomes increasingly insufficient for satisfying adolescents’ needs. Findings indicate that the context significantly affects adolescents’ SoC and that such effect is partly moderated by gender and age.  相似文献   
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