排序方式: 共有24条查询结果,搜索用时 31 毫秒
1.
Romain AzaïsAnne Gégout-Petit Jérôme Saracco 《Journal of statistical planning and inference》2012,142(2):481-492
In this paper we consider a semiparametric regression model involving a d-dimensional quantitative explanatory variable X and including a dimension reduction of X via an index β′X. In this model, the main goal is to estimate the Euclidean parameter β and to predict the real response variable Y conditionally to X. Our approach is based on sliced inverse regression (SIR) method and optimal quantization in Lp-norm. We obtain the convergence of the proposed estimators of β and of the conditional distribution. Simulation studies show the good numerical behavior of the proposed estimators for finite sample size. 相似文献
2.
Romain Aeberhardt Denis Fougère Julien Pouget Roland Rathelot 《Journal of population economics》2010,23(3):881-905
Our study focuses on the differences in wages and employment between French workers with French parents and French workers
with at least one African parent, using the Formation Qualification Professionnelle survey (Insee, Paris, 2003). We introduce
econometric decompositions, which allow us to reach conclusions when the potentially discriminated group is small. Then, we
clarify the impact of discrimination at the hiring level in this context. We find that unexplained parts in the employment
decompositions are much larger than in the wage decompositions. This suggests that, in France, labor market discrimination
is more frequent at the hiring level than in the compensation process. 相似文献
3.
4.
Magda?ChmielEmail author Martin?Brunner Romain?Martin Daniela?Schalke 《Social indicators research》2012,106(1):109-116
Subjective well-being is a broad, multifaceted construct comprising general satisfaction with life, satisfaction with life
domains (health, family, people, free time, self, housing, work, and finances), positive affect, and negative affect. Drawing
on representative data from middle-aged adults (N = 738), the authors used three different structural models to analyze the
interrelationships among these facets of subjective well-being. In a top-down model, a single factor representing global subjective
well-being explained the correlations found among the more specific facets of subjective well-being and exerted the strongest
influence on general satisfaction with life, satisfaction with health, and satisfaction with finances. In a bottom-up model,
satisfaction with the latter two domains had the strongest effect on global subjective well-being. The authors discuss the
implications of their findings for research on subjective well-being. 相似文献
5.
Arab society in Israel is positioned between the traditional, collective values of Arab culture and the more prevalent Western individualistic values of the Israeli society at large. This poses a challenge for the welfare services in Israel, especially in the case of Arab clients, who tend to receive and interpret the social workers' messages as contradictory to their cultural norms. Therefore, recruiting Arab fathers for treatment is a particularly difficult task. The article focuses on creating a culturally sensitive process for recruiting Arab fathers for treatment in a center dealing with Arab families at risk in Israel. 相似文献
6.
A parametric marginal structural model (PMSM) approach to Causal Inference has been favored since the introduction of MSMs by Robins [1998a. Marginal structural models. In: 1997 Proceedings of the American Statistical Association. American Statistical Association, Alexandria, VA, pp. 1–10]. We propose an alternative, nonparametric MSM (NPMSM) approach that extends the definition of causal parameters of interest and causal effects. This approach is appealing in practice as it does not require correct specification of a parametric model but instead relies on a working model which can be willingly misspecified. We propose a methodology for longitudinal data to generate and estimate so-called NPMSM parameters describing so-called nonparametric causal effects and provide insight on how to interpret these parameters causally in practice. Results are illustrated with a point treatment simulation study. The proposed NPMSM approach to Causal Inference is compared to the more typical PMSM approach and we contribute to the general understanding of PMSM estimation by addressing the issue of PMSM misspecification. 相似文献
7.
The aim of this study is twofold: first, to assess the statistical significance of the data used by Pierre Bourdieu in Distinction; second, to test the hypothesis that the volume of capital (i.e., the global amount of capital) allows for a finer discrimination of dispositional differences than the composition of capital (i.e., the respective weight of the different types of capital in the global amount of capital). To these ends, five data samples were submitted to bilateral between‐proportion comparison tests. The findings (1) reveal that about two‐thirds of the differences reported by P. Bourdieu are significant and (2) support the view that the volume of capital prevails over its composition. Cette étude poursuit deux objectifs : établir, d'une part, la significativité statistique des données ayant servi de base empirique au modèle que Pierre Bourdieu propose dans La distinction ; mettre à l’épreuve, d'autre part, l'hypothèse selon laquelle le volume de capital (i.e. la quantité globale de capital) constitue, en matière de différenciation dispositionnelle, une variable plus déterminante que la structure du capital (i.e. le poids respectif des différents types de capital au sein du volume global de capital). À cette double fin, les données relatives à cinq échantillons sont soumises à des tests de comparaison bilatérale de proportions indépendantes. Les résultats obtenus (1) révèlent que près des deux tiers des différences observées par P. Bourdieu sont significatives et (2) soutiennent l'hypothèse de la prépondérance du volume de capital sur sa structure. 相似文献
8.
Kimberly Bender Daniel Brisson Jeffrey M. Jenson Shandra Forrest-Bank Amy Lopez Jamie Yoder 《Child and Adolescent Social Work Journal》2011,28(4):319-334
Findings from children and youth who participated in structured after-school interventions in four urban public housing communities
are used to illustrate the complexities of conducting program-based research in after-school settings. Findings from four
field investigations reveal the importance of family support, reading skills, parent involvement, and positive peers in engaging
youth in services, developing academic skills and avoiding involvement in problem behavior. Challenges in conducting program-based
research and lessons learned from each of the four studies are discussed in the context of social work practice and after-school
programming for at-risk children and youth. 相似文献
9.
Romain Garbaye 《Immigrants & Minorities》2013,31(2-3):298-315
This essay retraces the history of immigration and ethnic minority politics in British cities in the post-war era. It shows that British cities evolved in that period from an attitude of indifference and/or hostility to immigrants in the late 1950s, to the creation of race-sensitive policies in the context of a bipartisan effort to depoliticize the issue at the national level in the 1960s, and finally to increasing participation of minorities in the politics of the Labour Party from the late 1970s onward. 相似文献
10.
Erik Gustafsson Julie Brisson Dominique Mailloux Marc Mainville Christelle Beaulieu Sylvain Sirois 《Infancy》2016,21(5):685-696
This study explores 12‐month‐olds' understanding of face‐to‐face conversation, a key contextual structure associated with engagement in a social interaction. Using a violation‐of‐expectations paradigm, we habituated infants to a “face‐to‐face” conversation, and in a test phase compared their looking times between “back‐to‐back” (conceptually novel) and “face‐to‐face” (conceptually familiar) conversations, while simultaneously manipulating perceptual familiarity in a 2 × 2 factorial design. We also analyzed dynamic changes in pupil dilation, which are considered a reliable measure of cognitive load that may index processing of social interactions. Infants looked relatively longer at perceptual changes (new speaker positions) but not at conceptual change (back‐to‐back conversation), suggesting that face‐to‐face conversation may not elicit particular expectations, and so may not carry any particular conceptual significance. Moreover, on the first test trial, larger pupil dilation was observed for familiar conditions, suggesting that familiarity with perceptual features could enhance processing of conversations. Thus, this study undermines assertions regarding infants' conceptual understanding of the social signals underlying engagement. Infants may rather recognize such signals through their perceptual familiarity and associated positive feelings. This may then increase their engagement when observing and participating in others' collaborative activities, in turn allowing for the development of knowledge regarding others' intentions. 相似文献