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71.
We revisit the question of why fertility behaviors and educational decisions appear to vary systematically across ethnic groups. We assess the possibility that differences in fertility across groups remain even though their socio-economic characteristics are similar. More specifically, we consider that parents’ fertility decisions are affected by the uncertainty concerning the future economic status of their offspring. We assume that this uncertainty varies across groups and is linked to the size of the group one belongs to. We find theoretical support for the minority status hypothesis according to which members of large minorities usually have a higher fertility than those in the majority facing low potential for social mobility while small minorities have lower fertility. 相似文献
72.
Paolo Gaibazzi 《Journal of ethnic and migration studies》2013,39(2):259-275
Sedentariness has been disregarded in migration studies. Although recent scholarship pays greater heed to immobility, the latter is often narrowly conceptualised as the exact opposite of mobility. This article attempts to overcome such dichotomies by focusing on agrarian life and activities in one of the most migratory rural contexts in West Africa, namely the Soninke villages of the Upper Gambia River valley. It shows how young men—normally the most mobile group in Soninke society—are trained to embody an agrarian ethos in order for them to be able to pursue not only agricultural livelihoods but also migratory ones. Physical, social and moral virtues cultivated in farm fields are thought to make the young man fit and adaptable to life and work abroad. The article further suggests that this agrarian ethos is reproduced through migratory dynamics, such as the integration of West African migrants as unqualified labourers in the stratified labour market of Europe and North America. As a synthesis or symbiosis between mobile and immobile cultural practices, the Soninke agrarian ethos provides us with ways of rethinking the relation between migration and sedentariness, thus bridging the dichotomy between the two. 相似文献
73.
Paolo Gaiardelli 《生产规划与管理》2013,24(12):1101-1102
74.
M. Laura Frigotto Graziano Coller Paolo Collini 《Journal of Management and Governance》2013,17(3):631-656
In this paper we discuss the Management Control Systems (MCSs)–strategy relationship in the light of an empirical analysis. We debate the attention to the fit of MCS and strategy at given moments in time which is typical of a contingency approach, and we search for an understanding of the dynamic evolution of the company over a continuous span of time. We deploy a diachronic analysis which involves a vertical and a horizontal conception of dynamics. We show that instantaneous fit between formal MCS and deliberate strategy is not helpful in illustrating evolution, nor is able to explain success. Conversely, the fit is to be played continuously on MCS and strategies at the level of practices. We also show the role of misfit between MCS and strategy: ambiguity implies the definition of blurred constraints for action which is freed. In this sense, we conclude that in the design of the MCS or strategy, attention does not have to be focused on the reciprocal fit, but rather on the ability of both (MCS and strategy) to support the exploration of new directions of evolution. Our case offers the intuition that identities, beyond practices, account for success in this case, as they embed both practices but also a way of being that, as a set of basic principles, directs behaviour when practices are missing, i.e., in the face of the new. 相似文献
75.
生态村——生态居住模式概述 总被引:1,自引:0,他引:1
生态村是在工业高度发展、科技高度进步的现代社会中,为了应对产生的各种问题而发展出的全新的生活理念。随着生态村运动的发展和生态实践的增多,人们开始转变以往将生态技术作为生态村主导的观念,开始尝试探索更加全面地认识和发展生态村及生态理念的方法。在生态村社中建立无秩序管理体制以达到社员平等、建设交流空间以满足其精神元素的需求、构建能源和物质的循环利用系统,防止污染和浪费,采用传统技术与现代科技相结合的方法建造房屋,这种基于传统工艺和小尺度的模式对于构建宜居聚居区域具有启发性。文章对生态村的理念及相关操作过程进行分析,说明生态村的工作原理及其意义。 相似文献
76.
This study evaluates the role of imperfect competition in determining the agri-food policies impact assessment outcomes. In most impact studies, the supply chain between agricultural production and final consumption is modelled in a perfectly competitive framework. However, there is a growing attention of stakeholders for the presence of imperfectly competitive markets, with the retail sector often being under investigation. This issue is empirically analysed with an application to the dairy industry. First, the degree of market power is estimated using a multi-output demand and price transmission equation system. Then, this model is used for policy simulation with the perfect competition outcome taken as a benchmark to evaluate the impact of imperfect competition. Results show a significant degree of market power in the dairy industry with implications on the projected policy scenarios. Moreover, the imperfect competition model alters the price transmission mechanisms, generating more flexible price trends. 相似文献
77.
78.
Problem gambling is a growing phenomenon in Italy, and there is increasing interest in studying the reasons for gambling in the Italian community. The Gambling Functional Assessment–Revised (GFA-R) was developed to assess two contingencies maintaining gambling behaviour: positive reinforcement and escape. The study hypothesized that the GFA-R could be translated and adopted in the Italian context. The main purpose of this study was to test the factor structure of the Italian version of the GFA-R by means of confirmatory factor analysis, its internal consistency and validity, in a sample of 667 Italian-speaking adults, recruited at universities, banks, of?ces, industries, markets, public parks and shops in five regions: Piemonte, Veneto, Lazio, Calabria and Puglia. The study found that the scale was internally consistent, and results showed that the original two-factor model fitted the data well. It also found moderate correlations between the GFA-R-I and both SOGS scores and GRCS scores. These results will allow Italian psychologists, educators and policymakers to identify specific contingencies maintaining gambling behaviour (positive reinforcement vs. escape) in the Italian community, detecting people more at risk of developing disordered gambling, with significant improvements in terms of prevention and clinical intervention. 相似文献
79.
The origins of the Gini index: extracts from Variabilità e Mutabilità (1912) by Corrado Gini 总被引:3,自引:0,他引:3
The scope of this paper is to celebrate the 100th anniversary of the Gini index by providing the original formulae. Corrado Gini introduced his index for the first time in a 1912 book published in Italian under the name of ??Variabilità e Mutabilità?? (Variability and Mutability). This article provides selected extracts of Part I of the book dedicated to measures of variability. We find that Gini proposed no less than 13 formulations of his index, none of which is known today to the large public. We also find that Gini anticipated some of the developments that derived from the study of his index. 相似文献
80.