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This study forms part of a general programme of territorial research in Italy developed by the Italian National Statistical Institute (ISTAT). In particular we have studied the metropolitan communes, both with regard to movements within the city and to the attraction cities exert over the communes in the surrounding areas. Based on the daily work-related flows, we have identified the Local Labour Systems (LLSs). The LLSs having as their hub the twelve metropolitan communes constitute the Local Metropolitan Systems (LMSs). Among these we have chosen to analyse in detail the quality of life in the Systems of Milan, Genoa and Palermo, which have been singled out as exemplary cases of current socio-economic differentiations. 相似文献
234.
Although one of the most marked demographic trends observed over the twentieth century is the increased rate of divorce, relatively little research has explored the effects of these changing marital patterns in the context of an aging society. Using a sample of lone elderly parents and their adult children, we analyze the direct and indirect effects of marital disruption on four important dimensions of intergenerational transfers: coresidence, financial assistance, adult children's provision of informal care, and parental purchase of paid care. Our findings suggest that divorce has deleterious effects on intergenerational transfers, particularly for elderly fathers. Remarriage further reduces exchange. Our results reveal that parents engage in lower levels of transfers with stepchildren relative to biological children. Moreover, intergenerational transfers are sensitive to characteristics of biological children but not to those of stepchildren. Taken together, these results suggest that exchange at the end of the life course continues to be adversely affected by marital disruption. 相似文献
235.
Leaving school prematurely is often claimed to be among the most negative consequences of early marriage and pregnancy for girls in less developed countries. However, an analysis of the relative frequency with which these events actually occur or are named as reasons for leaving school reveals that, at least in the case of francophone Africa, they explain no more than 20 per cent of dropouts. To the extent that demographic events trump school or family factors as determinants of school-leaving, our data indicate that it is union formation--defined by the DHS as first marriage or cohabitation--rather than childbirth that is more likely to have this effect. 'Schoolgirl pregnancy' typically accounts for only between 5 and 10 per cent of girls' departures from school. Furthermore, the risks of leaving school because of pregnancy or marriage have declined over time with the decline in rates of early marriage and childbearing. 相似文献
236.
Anne‐Lise Goddings Adriene Beltz Jiska S. Peper Eveline A. Crone Barbara R. Braams 《Journal of research on adolescence》2019,29(1):32-53
Over the past two decades, there has been a tremendous increase in our understanding of structural and functional brain development in adolescence. However, understanding the role of puberty in this process has received much less attention. This review examines this relationship by summarizing recent research studies where the role of puberty was investigated in relation to brain structure, connectivity, and task‐related functional magnetic resonance imaging (fMRI). The studies together suggest that puberty may contribute to adolescent neural reorganization and maturational advancement, and sex differences also emerge in puberty. The current body of work shows some mixed results regarding impact and exact direction of pubertal influence. We discuss several limitations of current studies and propose future directions on how to move the field forward. 相似文献
237.
The content and valence of women's body image attitudes, general and enduring positive or negative feelings about the body, are studied with psychometric analyses of measures and contrasted groups. Data from two frequently used measures (Body Image Scale, Derogatis & Melisaratos, 1979; Body Satisfaction Scale, Berscheid, Walster & Bohrnstedt, 1973) provided an evaluation of the construct and the assessment of body image. Two studies are provided. The construct analyses suggest two contents for body attitude measures: a general factor of body, facial, and sexual (genital and breast) items, and a second factor assessing weight and/or its body correlates-the hips, thighs, and buttocks. Also, a method factor, a response style of negativity, may be important. Body image attitudes are correlated with some conceptually relevant criteria, such as interest in engaging in sexual activity; however, these relationships do not appear sufficiently strong to predict behavior, such as the occurrence or resolution of sexual dysfunction. Generalized body image disturbance as currently conceptualized and assessed may be difficult to document, particularly when item content and response styles are considered. 相似文献
238.
Barbara S. Mann 《Economic inquiry》1991,29(1):115-118
The relationship between Arrow-Pratt measures of risk aversion and the standard income and substitution effects in certainty problems is presented. Particular emphasis is placed on the relationship between curvature properties of indifference maps and properties of relative risk aversion. The results are applied to the demand for insurance and in models with asymmetric information. 相似文献
239.
We describe a simple measure of fertility control: the proportion of all births from the age-specific fertility schedule that occurs among women by age 35. This measure has broad applicability because it does not require information on marital fertility rates. When both the proportion of births by age 35 and the most commonly used measure of fertility control, m, are calculated for a population over time, they are correlated very highly. Because of increasing levels of nonmarital fertility in several developed countries, measures of fertility control that are based on marital fertility are less appropriate now than in the past. 相似文献
240.