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141.
This article examines the determinants of return of Senegalese, Ghanaian and Congolese migrants in Europe, and the extent to which their return decisions were linked to reasons and circumstances of their initial migration to Europe. We utilize the retrospective life history data collected by the MAFE Project in Senegal, Ghana and DR Congo and six European countries in order to understand whether and how changing conditions in both origin and destination countries, including policies, affect the migration dynamics between Sub‐Saharan Africa and Europe. The results show how the high cost entailed by this type of transcontinental long distance migration, reinforced by restrictive immigration policies, tend to delay and reduce return in comparison to shorter‐distance moves. In addition, brain circulation and transnational family arrangements seem to be at work and seriously question the dominant approach to admission and circulation policies in Europe.  相似文献   
142.
Immigration control, widely regarded the sovereign right of nation states, has often been pursued at the expense of civil and human rights. More than a century ago, nativists legitimated a punitive approach to immigration control that treated migrants’ rights as secondary by branding millions of newcomers to the United States as a “dangerous class”. In many ways, recent policies similarly criminalize immigrants and deploy crime control strategies in response. This article reviews the most significant of these policies at the federal and local state level, including: border security measures, detention and deportation, the 287(g) program, anti‐immigrant city ordinances, and the Arizona law (SB1070). Each initiative has been framed as necessary to protect American citizens from serious crime. We focus on four ways in which these policies violate human rights: first, border security measures that result in migrant deaths violate the right to life; second, detention and deportation violate the right to liberty; third, detention and deportation punish unlawful residents as though they were guilty of criminal rather than civil violations of the law, imposing penalties that are arbitrary and disproportionately harsh; and fourth, local state policies to counter illegal immigration encourage racial profiling, a practice that violates the right to freedom from discrimination.  相似文献   
143.
Southern European welfare states have developed relatively solid social insurance income maintenance programs, but have lacked effective means-tested benefit systems to address poverty and protect outsiders. Spain and Portugal are usually considered the two first countries to depart from the traditional path with the creation of minimum income schemes between 1988 and 1995. In the Spanish case, minimum income programs were established at the regional level and are very heterogeneous despite their institutional stability. The limited extent of these programs in most Spanish regions must be put in the context of national means-tested income support schemes in the fields of pensions and unemployment. The introduction of these programs in the 1980s was also a significant path departure. The combination of these programs has offered some income support to low income groups left unprotected by traditional insurance benefits, although in a patchy and limited way, especially as regards the working-age population. The social effects of the Great Recession, especially in terms of long-term unemployment, evictions and impoverishment, have reopened the debate on how to combat monetary poverty, which has been on the general election agenda since 2014–2015. Most regions have reformed their programs in different directions since 2008, under the contradictory pressures of growing demand and financial constraints. Such debate, however, has not been able yet to set a clear basis for a new development of anti-poverty income support policy.  相似文献   
144.
In this paper, we study the problem of testing the hypothesis on whether the density f of a random variable on a sphere belongs to a given parametric class of densities. We propose two test statistics based on the L2 and L1 distances between a non‐parametric density estimator adapted to circular data and a smoothed version of the specified density. The asymptotic distribution of the L2 test statistic is provided under the null hypothesis and contiguous alternatives. We also consider a bootstrap method to approximate the distribution of both test statistics. Through a simulation study, we explore the moderate sample performance of the proposed tests under the null hypothesis and under different alternatives. Finally, the procedure is illustrated by analysing a real data set based on wind direction measurements.  相似文献   
145.
We address the problem of robust model selection for finite memory stochastic processes. Consider m independent samples, with most of them being realizations of the same stochastic process with law Q, which is the one we want to retrieve. We define the asymptotic breakdown point γ for a model selection procedure and also we devise a model selection procedure. We compute the value of γ which is 0.5, when all the processes are Markovian. This result is valid for any family of finite order Markov models but for simplicity we will focus on the family of variable length Markov chains.  相似文献   
146.
147.
Migratory movements are one of the most remarkable demographic, social and psychological phenomena in today’s world. For the people involved, these migrations pose a radical change in environment and in their lives as they face adaptation to new perceptions, values and behaviours. All these lead to major challenges and repercussions for their personal and social identities. Using the Theory of Social Identity as our interpretative framework, together with a qualitative methodology based on semi-structured interviews, we have researched the entrepreneurial behaviour seen in 94 immigrants. We show the strategies adopted by these immigrants for personal mobility, social creativity and social competition to cope with the negative social identity derived from the occupational segregation and socio-labour exclusion they experience in the labour market and as mechanisms for psychosocial adaptation to the social, political, economic and labour characteristics in their environment.  相似文献   
148.
Rising rates of heterosexually transmitted HIV among youth and young adults, particularly from ethnic minorities, create an urgent need to understand risk factors and perceptions of risk within the context of couple relationships. This study examined reports of young mothers and fathers (predominantly Latino) about background characteristics, relationship quality and length, HIV-related risk factors, and perceptions of partners’ behaviors and personal history. Higher concordance was found for relationship characteristics and partners' personal history (e.g., incarceration) than on shared sexual behaviors. Most males and females stated that they were monogamous; however, those whose partners reported concurrency were unaware of this. Many were unaware of their partners’ HIV testing status. Relationship quality was higher when females accurately perceived their partners' self-reported HIV-related risk behaviors. Length of the relationship did not influence concordance. Findings support the need for HIV prevention programs to promote open discussion about condom use and HIV testing within sexual partnerships.  相似文献   
149.
Psychological well-being in adolescence is an increasing field of study. Deepening in its knowledge during this period of life can be of a lot of help to the designing of more adjusted prevention programs aimed to avoid or reduce the problems adolescents might be experiencing. Complexity theories can be a productive alternative to the important limitations explanations about psychological well-being in adolescence have nowadays. Answers to a questionnaire have been obtained from a sample of 968 Catalan adolescents from 12 to 16 years old including 29 psychological well-being indicators measuring 8 dimensions related to satisfaction with specific life domains, self-esteem, perceived social support, perception of control and values.A structural equation modelling approach to complexity that focuses on the non-linearity property has been followed. Given the large number of dimensions, the model has been estimated in two steps. First, a confirmatory factor analysis model has been fitted to the 29 indicators and appropriate factor scores have been saved. Then all possible products and squared terms of the factor scores have been computed and have been used as predictors of the dependent variable using an ordered logit model.The results show that a non-linear model including interaction effects among the 8 dimensions, age and gender, has a higher explanatory power to predict satisfaction with life as a whole, compared to a linear model estimated from those same indicators.This work must be understood as a first step, basically a methodological one, to the future elaboration of new models of psychological well-being in adolescence to be based on the principles defended by complexity theories.  相似文献   
150.
This study adopts satisfaction with life as a whole and satisfaction with specific life domains as indicators to analyse the relationships between the well-being of 12 to 16-year-old adolescents and some related constructs such as self-esteem, perceived control and perceived social support. Well-being indicators from a 2003 Spanish sample using an 11-point scale (N = 1,634) are compared with an equivalent 1999 Spanish sample using a 5-point scale (N = 1,618). The different results obtained from the 2003 sample with a Principal Component Analysis (PCA) using a shorter and a longer list of life domains are also discussed. A sub-sample of the adolescents’ results from the 2003 sample are compared with their parents’ answers, using the same well-being indicators. Using a list of 8 life domains, and despite the change of scale used, overall results show no relevant changes in adolescents’ satisfaction with life domains between 1999 and 2003 in Spain and are in agreement with normative data expected from western societies [Cummins: 1998, Social Indicators Research 43, pp. 307–334; Cummins et al.: 2001, Australian Unity Well-being Index (Australian Centre on Quality of Life, Deakin University, Melbourne)]. Adolescents’ overall life satisfaction has been shown to correlate consistently with the other well-being related constructs. However, it clearly decreases with age over the period studied. The results also show that increasing the list of life domains has a major impact on the structure of the results obtained. When we compare results from parents with those from their own child, outstanding differences in well-being appear between generations: few domain satisfaction dimensions show significant correlation between parents and children and more than 20% of the population studied shows high discrepancies in the answers in four domains.  相似文献   
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