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51.
52.
We focus on the construction of confidence corridors for multivariate nonparametric generalized quantile regression functions. This construction is based on asymptotic results for the maximal deviation between a suitable nonparametric estimator and the true function of interest, which follow after a series of approximation steps including a Bahadur representation, a new strong approximation theorem, and exponential tail inequalities for Gaussian random fields. As a byproduct we also obtain multivariate confidence corridors for the regression function in the classical mean regression. To deal with the problem of slowly decreasing error in coverage probability of the asymptotic confidence corridors, which results in meager coverage for small sample sizes, a simple bootstrap procedure is designed based on the leading term of the Bahadur representation. The finite-sample properties of both procedures are investigated by means of a simulation study and it is demonstrated that the bootstrap procedure considerably outperforms the asymptotic bands in terms of coverage accuracy. Finally, the bootstrap confidence corridors are used to study the efficacy of the National Supported Work Demonstration, which is a randomized employment enhancement program launched in the 1970s. This article has supplementary materials online. 相似文献
53.
In this article, we analyze mortality rates of Finns born in areas that were ceded to the Soviet Union after World War II
and from which the entire population was evacuated. These internally displaced persons are observed during the period 1971-2004
and compared with people born in the same region but on the adjacent side of the new border. We find that in the 1970s and
1980s, the forced migrants had mortality rates that were on par with those of people in the comparison group. In the late
1980s, the mortality risk of internally displaced men increased by 20% in relation to the expected time trend. This deviation,
which manifests particularly in cardiovascular mortality, coincides with perestroika and the demise of the Soviet Union, which
were events that resulted in an intense debate in civil society about restitution of the ceded areas. Because state actors
were reluctant to engage, the debate declined after some few years, and after the mid-1990s, the death risk again approached
the long-term trend. Our findings indicate that when internally displaced persons must adjust to situations for which appropriate
coping behaviors are unknown, psychosocial stress might arise several decades after their evacuation. 相似文献
54.
55.
Family engagement within the context of assessment in child protection practice: The case of Estonia
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Engagement in the context of child protection is of significant international interest, as the participation of family is a central notion in child and family social work. Drawing on in‐depth, semistructured interviews with a sample of 26 child protection workers in 1 region in Estonia, this article reports the findings of the participants' perspectives on family engagement in the context of child protection assessment. Child protection workers perceive the engagement related to 3 aspects: first, it is associated to the acts of the worker; second, it is associated to parental part of actions—depending on parents themselves; and third, engagement was seen as “doing together” with the family, referring to partnership. The aim of the engagement was mainly considered in the terms of empowerment—empowering family to cope on their own and to take charge of their lives. The negative image of child protection was recognised as one of the main barriers to the family engagement. Understanding the family and their situation was seen as the basis for a trusting relationship, being the most crucial factor to promoting family engagement. 相似文献
56.
Mariann Olsson Tina Lundberg Carl Johan Fürst Joakim Öhlén Ulla Forinder 《Journal of social work in end-of-life & palliative care》2017,13(1):44-60
Despite the evidence of unmet support needs among young people who have lost a parent to cancer, only a few support group initiatives have been reported. This observational prospective study explored the psychosocial well-being of young people who participated in support groups at a Swedish specialist palliative care setting. On three occasions, 29 participants, aged 16–28 years, answered questionnaires covering characteristics of the participants, circumstances of the losses, psychosocial well-being of the young people, and their own assessment of the support groups. The support groups attracted mostly young women who were often unprepared for the loss. The living arrangements differed between younger and older participants; however, the loss-related variables did not differ. Significant positive changes were found regarding a sense of meaning in their future life and life satisfaction. The helpfulness of the group was assessed as high/very high and the group brought a valuable fellowship with others in a similar situation. Universality and beneficial interactions were reported and strengthened psychosocial well-being developed over time. This change, according to the young people themselves, may be attributed to the group support. The findings are useful for planning interventions to support young people in bereavement in order to enhance their psychosocial well-being. 相似文献
57.
Caroline Vandenplas Michèle Ernst Stähli Dominique Joye Alexandre Pollien 《Mathematical Population Studies》2017,24(2):103-125
ABSTRACTAdjustment for nonresponse should reduce the nonresponse bias without decreasing the precision of the estimates. Adjustment for nonresponses are commonly based on socio-demographic variables, although these variables may be poorly correlated with response propensities and with variables of interest. Such variables nevertheless have the advantage of being available for all sample units, whether or not they are participating in the survey. Alternatively, adjustment for nonresponse can be obtained from a follow-up survey aimed at sample units which did not participate in the survey and from which the variables are designed to be correlated with response propensities. However, information collected through these follow-up surveys is not available for people in the sample who participated neither in the survey nor in its nonresponse follow-up. These two sets of variables when used in a nonresponse model for the Swiss European Social Survey 2012 differ only slightly with regard to their effect on bias correction and on the precision of estimates. The variables from the follow-up are performing slightly better. In both cases, the adjustment for nonresponse performs poorly. 相似文献
58.
In this article, two new powerful tests for cointegration are proposed. The general idea is based on an intuitively appealing extension of the traditional, rather restrictive cointegration concept. In this article, we allow for a nonlinear, but most importantly a different, asymmetric convergence process to account for negative and positive changes in our cointegration approach. Using Monte Carlo simulations we verify, that the estimated size of the first test depends on the unknown value of a signal-to-noise ratio q. However, our second test—which is based on the original ideas of Kanioura and Turner—is more successful and robust in the sense that it works in all of the different evaluated situations. Furthermore it is shown to be more powerful than the traditional residual based Enders and Siklos method. The new optimal test is also applied in an empirical example in order to test for potential nonlinear asymmetric price transmission effects on the Swedish power market. We find that there is a higher propensity for power retailers to rapidly and systematically increase their retail electricity prices subsequent to increases in Nordpool's wholesale prices, than there is for them to reduce their prices subsequent to a drop in wholesale spot prices. 相似文献
59.
In this study, we investigate linear regression having both heteroskedasticity and collinearity problems. We discuss the properties related to the perturbation method. Important observations are summarized as theorems. We then prove the main result that states the heteroskedasticity-robust variances can be improved and that the resulting bias is minimized by using the matrix perturbation method. We analyze a practical example for validation of the method. 相似文献
60.
Socio-demographic Differences in Self-reported Psychological Distress Among 25- to 64-Year-Old Finns 总被引:1,自引:0,他引:1
Kirsi Talala Taina Huurre Hillevi Aro Tuija Martelin Ritva Prättälä 《Social indicators research》2008,86(2):323-335
Background Mental health problems are a major public health issue worldwide. The aim of this study was to assess the relative importance
of socio-demographic characteristics associated with different domains of psychological distress in Finland. Methods Data source was a nationwide survey “Health Behaviour and Health among the Finnish Adult Population” (AVTK), from years 2002
to 2003 (N = 5425; response rate 66%). Psychological distress was measured by self-reported questions of general mental health (MHI-5),
depression, insomnia and stress. Socio-demographic factors included education, employment status, partnership and children
living in the household. Main analyses were conducted by multivariate logistic regression. Results Education, employment and partnership were associated with most of the psychological distress outcomes. Respondents with a
lower educational level had poor mental health in both genders but less insomnia and stress in men. Those with an intermediate
education had the least stress in women. The unemployed and retired were at a higher risk for poor mental health and depression.
Moreover, employment status was associated with insomnia and stress in men. Respondents not having a partner showed a higher
risk of psychological distress according to all measures. Not having children living in the household was associated with
insomnia in women and with less stress in men. Conclusions Socio-demographic factors, such as having a partner and employment status, are associated with several measures of psychological
distress indicating the importance of social and economic factors to psychological well-being. The association of education
and of having children living at home varies by the domain of psychological distress measure. 相似文献